CMC · California Mechanical Code

What are the duties and powers of the code official (building/mechanical official)?

Q: Who is the “code official”?

The code official is the appointed official in charge of the jurisdiction’s code compliance agency; that official implements, administers and enforces the code. See § 103.1 and the administration notes for appointment and deputies.

In plain terms: the code official is the jurisdiction’s decision‑maker for enforcing the Mechanical Code. They can require written submittals, qualified technical reports and tests, approve equivalent alternative materials/methods when justified, keep official records and issue notices — but they may not waive requirements the code explicitly prescribes.

Ask a question free See coverage

Last reviewed: July 6, 2026

What the code requires — 2–4 sentences

The California Mechanical Code adopts the standard administration framework where the code official is authorized to enforce the code and to determine compliance, render official interpretations, adopt clarifying policies, require technical documentation and approve alternatives. The controlling administrative provisions are collected under § 104 (e.g., § 104.1, § 104.2, § 104.2.1, § 104.2.2) — note: the uploaded California Mechanical Code file in this workspace lists adoption of Division II (including § 101–104) but the explicit text of the CMC § 104 was not included in the CMC file I retrieved; equivalent, nearly identical language appears in the California Building, Existing Building, Fire and Wildland‑Urban Interface codes and is the practical model used by jurisdictions for § 104 functions.

The single most important rule: the code official is the jurisdiction’s decision‑maker for code compliance and may require technical reports, tests, and written approval requests for alternatives — but may not waive requirements that the code explicitly prescribes (see § 104.1 and § 104.2).

Requirements in detail

Core authorities (plain list)

Authority to enforce the code — the code official is authorized and directed to enforce the code. § 104.1.
Authority to determine compliance and interpret the code — the code official can render interpretations and adopt policies/procedures to clarify application; interpretations must comply with the code’s intent and cannot waive explicit code requirements. § 104.2.
Authority to require technical assistance — the code official may require an owner or owner’s agent to provide a technical opinion and report, prepared by qualified professionals and provided without charge to the jurisdiction. § 104.2.1 (or analogous subsection).
Authority to require tests where evidence of compliance is lacking; test methods must be recognized standards or approved by the official. § 104.2.1.4 / § 104.2.2.4.
Authority to approve alternative materials, designs and methods provided they meet equivalency and intent criteria; requests must be submitted in writing and, if denied, the official must state reasons in writing. § 104.2.2 (and subparts).

Decision‑relevant dimensions — quick reference table

Action / Power	When it applies	Who is typically required to act	Code reference
Enforce code provisions	Always for regulated work	Code official (jurisdiction)	§ 104.1
Interpret code / adopt policies	To clarify application of provisions	Code official; written policies/interpretations	§ 104.2
Require technical opinion / report	Where compliance is unclear or novel	Owner / owner’s agent; prepared by qualified engineer/specialist; provided without charge	§ 104.2.1
Require tests	When evidence of compliance is insufficient	Tests by party acceptable to code official; approved methods	§ 104.2.1.4 / § 104.2.2.4
Approve alternative materials/methods	When applicant submits written request	Owner/agent submits; code official approves if equivalent	§ 104.2.2 and equivalency criteria (quality, strength, effectiveness, durability, safety, fire safety)
Maintain official records	Approvals, inspections, tests, fees — retained per records rules	Code official keeps records (minimum retention periods)	§ 104.7 (see Building Code example)
Issue notices/orders; carry ID	To secure compliance or perform inspections	Code official issues notices/orders; carries identification when inspecting	§ 104.5, § 104.6 (building code examples)
Immunity for official actions	Good‑faith enforcement actions defended by jurisdiction	Legal defense and relief from personal liability for official	§ 104.8 and § 104.8.1 (liability and legal defense)

Notes: the explicit CMC § 104 text was not found in the uploaded CMC file preview returned to me, but these items are the standard California code family § 104 duties/powers and are reflected in the Building, Existing Building, Fire and Wildland codes; jurisdictions normally adopt equivalent language for the Mechanical Code.

Procedural specifics you should know

A technical opinion and report must be prepared by a qualified engineer, specialist, laboratory or other acceptable organization and may be required to bear the stamp of a registered design professional when required by the code official. § 104.2.1.2.
An alternative (material/design/method) is approved only if it is found to be not less than the equivalent of the code-prescribed solution with respect to quality, strength, effectiveness, durability, safety (including fire safety). § 104.2.2.4.
Interpretations, policies or procedures adopted by the official must not waive any requirement expressly stated in the code. § 104.2 (items 1–2).

Exceptions & special cases

Performance‑based alternatives that comply with recognized performance codes may be acceptable; some specialized agencies (for example DSA/OSHPD) may have additional or different approval criteria and may prohibit certain performance exceptions — consult the applicable adopting agency notes. See the Building Code cross‑references for examples of these exceptions and agency notes. § 104.2.3 and related exceptions.
Where a code or referenced standard requires an equipment or material listing, the listing must be based on the specified standard or approved listing criteria; installation must follow the listing and manufacturer’s instructions and those documents must be made available when verifying compliance. § 104.2.1 (listed compliance / listed equipment).
If the jurisdiction’s adopted CMC version differs locally (local amendments), the local adoption document controls; always check the local municipal code for amendments or administrative regulations (appointment, deputies, delegations). The uploaded CMC adoption table indicates certain sections and subsections may be adopted or modified.

Common mistakes

Treating the code official’s policy or interpretation as a permanent waiver — an interpretation may clarify application but cannot waive explicit code mandates. § 104.2.
Failing to provide a required technical report prepared by a qualified professional or trying to pass study/test results that don’t follow recognized test standards — the code official can reject inadequate submissions and require approved test procedures. § 104.2.1.2 / § 104.2.1.4.
Assuming an alternative is approved without a written approval from the code official. Requests must be submitted in writing and denials must be in writing with reasons. § 104.2.2.2.
Confusing “listed” equipment compliance — if a listing standard is specified, the listing must be to that standard and the official may require the listing standard/manufacturer instructions to verify compliance. § 104.2.1 (listed compliance).

Worked example — HVAC duct alternative material (concrete scenario with numbers)

Scenario: A mechanical contractor intends to install a new duct material A (non‑standard metal composite) for an HVAC system in a small commercial tenant space.

Steps the code official may follow under § 104:

Contractor submits a written request for an alternative materials/methods approval to the code official including technical substantiation. § 104.2.2.2.
The code official reviews and finds evidence of compliance is insufficient and therefore requires a technical opinion and report prepared by a registered mechanical engineer and two lab test reports (e.g., leakage and fire performance) to be performed to recognized standards. The code official may specify which test standards are acceptable. The reports must be provided without charge to the jurisdiction. § 104.2.1.1–.4.
The engineer’s report evaluates the proposed material against the equivalency criteria (quality, strength, effectiveness, durability, safety, fire safety). If the report and tests show the material meets or exceeds the prescribed duct performance, the code official may approve the alternative in writing. § 104.2.2.4.
Concrete numbers example: the official requires that the duct system meets a leakage class equivalent to the standard (e.g., leakage ≤ 6% at specified pressure per the referenced table) and that fire/smoke spread tests meet the same classification as the specified metal duct. If tests show leakage of 4% and fire classification equal to the standard, the official can approve. (The numerical leakage threshold above is illustrative of the type of measurable criterion the official would rely on; consult the specific mechanical test standard and referenced CMC tables for exact numeric test criteria.)

Related provisions

§ 103.1 — Creation of the code compliance agency; appointment of the code official.
§ 104.5 — Identification; building/mechanical official must carry proper identification when inspecting.
§ 104.6 — Notices and orders (procedures for notices of violations).
§ 104.7 — Official records (approvals, inspections, tests, fees and retention).
§ 104.8 / § 104.8.1 — Liability protection and legal defense for officials acting in good faith.
§ 105 — Permits (the code official’s role in permit issuance and records).

Note on sources: the California Mechanical Code document included in the uploaded files shows adoption metadata for Division II (including § 101–104) but the explicit CMC § 104 text was not present in the CMC file preview I retrieved; the language summarized above is drawn from the standard California code family § 104 language as found in the California Building, Existing Building, Fire and Wildland‑Urban Interface code excerpts in the file set. Where I cite a specific § (for example § 104.2.1) the supporting text was found in those California code files.

Code references

Grounded in the retrieved California Mechanical Code — click a citation to read the verbatim passage:

CMC § 104.1 High relevance — show source text
SECTION 104—DUTIES AND POWERS OF THE CODE OFFICIAL

[A] 104.1 Powers and duties of the code official. The code official is hereby authorized to enforce the provisions of this code.

[A] 104.2 Determination of compliance. The code official shall have the authority to determine compliance with this code, to render interpretations of this code and to adopt policies and procedures in order to clarify the application of its provisions. Such interpretations, policies and procedures:
1. Shall be in compliance with the intent and purpose of this code.
2. Shall not have the effect of waiving requirements specifically provided for in this code.
[A] 104.2.1 Technical assistance. To determine compliance with this code, the code official is authorized to require the owner, the owner’s authorized agent or the person in possession or control of the building or premises to provide a technical opinion and report.

[A] 104.2.1.1 Costs. A technical opinion and report shall be provided without charge to the jurisdiction.

[A] 104.2.1.2 Preparer qualifications. The technical opinion and report shall be prepared by a qualified engineer, specialist, laboratory or fire safety specialty organization acceptable to the code official. The code official is authorized to require design submittals to be prepared by, and bear the stamp of, a registered design professional.

[A] 104.2.1.3 Content. The technical opinion and report shall analyze the properties of the design, operation or use of the building or premises, the facilities and appurtenances situated thereon and fuel management to identify and propose necessary recommendations.

[A] 104.2.1.4 Tests. Where there is insufficient evidence of compliance with the provisions of this code, the code official shall have the authority to require tests as evidence of compliance. Test methods shall be as specified in this code or by other recognized test standards. In the absence of recognized test standards, the code official shall approve the testing procedures. Such tests shall be performed by a party acceptable to the code official.

[A] 104.2.2 Alternative materials, design and methods. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved.

[A] 104.2.2.1 Approval authority. An alternative material, design or method shall be approved where the code official finds that the proposed alternative is satisfactory and complies with Sections 104.2.2.2 through 104.2.2.7, as applicable.

[A] 104.2.2.2 Application and disposition. Where required, a request to use an alternative material, design or method of construction shall be submitted in writing to the code official for approval. Where the alternative material, design or method of construction is not approved, the code official shall respond in writing, stating the reasons the alternative was not approved.

[A] 104.2.2.3 Compliance with code intent. An alternative material, design or method of construction shall comply with the intent of the provisions of this code.

[A] 104.2.2.4 Equivalency criteria. An alternative material, design or method of construction shall, for the purpose intended, be not less than the equivalent of that prescribed in this code with respect to all of the following, as applicable:
1. Quality.
2. Strength.
3. Effectiveness.
4. Durability.
5. Safety, other than fire safety.
6. Fire safety.
CMC § 102.7 High relevance — show source text
[A] 102.7 Partial invalidity. In the event that any part or provision of this code is held to be illegal or void, this shall not have the effect of making void or illegal any of the other parts or provisions.

[A] 102.8 Existing conditions. The legal occupancy or use of any structure or condition existing on the date of adoption of this code shall be permitted to continue without change, except as is specifically covered in this code or the California Fire Code, California Building Code, California Existing Building Code or the California Residential Code, or as is deemed necessary by the code official for the general safety and welfare of the occupants and the public.

1-16 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

ADMINISTRATION

PART 2—ADMINISTRATION AND ENFORCEMENT

SECTION 103—CODE COMPLIANCE AGENCY

[A] 103.1 Creation of agency. The [ INSERT NAME OF DEPARTMENT ] is hereby created and the official in charge thereof shall be known as the code official. The function of the agency shall be the implementation, administration and enforcement of the provisions of this code.

[A] 103.2 Appointment. The code official shall be appointed by the chief appointing authority of the jurisdiction.

[A] 103.3 Deputies. In accordance with the prescribed procedures of this jurisdiction and with the concurrence of the appointing authority, the code official shall have the authority to appoint a deputy code official, other related technical officers, inspectors and other employees. Such employees shall have powers as delegated by the code official.

SECTION 104—DUTIES AND POWERS OF THE CODE OFFICIAL

[A] 104.1 Powers and duties of the code official. The code official is hereby authorized to enforce the provisions of this code.

[A] 104.2 Determination of compliance. The code official shall have the authority to determine compliance with this code, to render interpretations of this code and to adopt policies and procedures in order to clarify the application of its provisions. Such interpretations, policies and procedures:
1. Shall be in compliance with the intent and purpose of this code.
2. Shall not have the effect of waiving requirements specifically provided for in this code.
[A] 104.2.1 Technical assistance. To determine compliance with this code, the code official is authorized to require the owner, the owner’s authorized agent or the person in possession or control of the building or premises to provide a technical opinion and report.

[A] 104.2.1.1 Costs. A technical opinion and report shall be provided without charge to the jurisdiction.

[A] 104.2.1.2 Preparer qualifications. The technical opinion and report shall be prepared by a qualified engineer, specialist, laboratory or fire safety specialty organization acceptable to the code official. The code official is authorized to require design submittals to be prepared by, and bear the stamp of, a registered design professional.

[A] 104.2.1.3 Content. The technical opinion and report shall analyze the properties of the design, operation or use of the building or premises, the facilities and appurtenances situated thereon and fuel management to identify and propose necessary recommendations.
CMC § 102.4 High relevance — show source text
[A] 102.4 Referenced codes and standards. The codes and standards referenced in this code shall be considered part of the requirements of this code to the prescribed extent of each such reference and as further regulated in Sections 102.4.1 and 102.4.2.

Exception: Where enforcement of a code provision would violate the conditions of the listing of the equipment or appliance, the conditions of the listing shall govern.

[A] 102.4.1 Conflicts. Where conflicts occur between provisions of this code and referenced codes and standards, the provisions of this code shall apply.

[A] 102.4.2 Conflicting provisions. Where the extent of the reference to a referenced code or standard includes subject matter that is within the scope of this code, the provisions of this code, as applicable, shall take precedence over the provisions in the referenced code or standard.

[A] 102.5 Partial invalidity. In the event that any part or provision of this code is held to be illegal or void, this shall not have the effect of making void or illegal any of the other parts or provisions.

PART 2—ADMINISTRATION AND ENFORCEMENT

SECTION 103—CODE COMPLIANCE AGENCY

[A] 103.1 Creation of agency. The [ INSERT NAME OF DEPARTMENT ] is hereby created, and the official in charge thereof shall be known as the code official. The function of the agency shall be the implementation, administration and enforcement of the provisions of this code.

[A] 103.2 Appointment. The code official shall be appointed by the chief appointing authority of the jurisdiction.

[A] 103.3 Deputies. In accordance with the prescribed procedures of this jurisdiction and with the concurrence of the appointing authority, the code official shall have the authority to appoint a deputy code official, other related technical officers, inspectors and other employees. Such employees shall have powers as delegated by the code official.

SECTION 104—DUTIES AND POWERS OF CODE OFFICIAL

[A] 104.1 General. The code official is hereby authorized and directed to enforce the provisions of this code.

[A] 104.2 Determination of compliance. The code official shall have the authority to determine compliance with this code, to render interpretations of this code and to adopt policies and procedures in order to clarify the application of this code’s provisions. Such interpretations, policies, and procedures:
1. Shall be in compliance with the intent and purpose of this code.
2. Shall not have the effect of waiving requirements specifically provided for in this code.
[A] 104.2.1 Listed compliance. Where this code or a referenced standard requires equipment, materials, products or services to be listed and a listing standard is specified, the listing shall be based on the specified standard. Where a listing standard is not specified, the listing shall be based on an approved listing criteria. Listings shall be germane to the provision requiring the listing. Installation shall be in accordance with the listing and the manufacturer’s instructions, and where required to verify compliance, the listing standard and manufacturer’s instructions shall be made available to the code official.

[A] 104.2.2 Technical assistance. To determine compliance with this code, the code official is authorized to require the owner or owner’s authorized agent to provide a technical opinion and report.

[A] 104.2.2.1 Cost. A technical opinion and report shall be provided without charge to the jurisdiction.
CMC § 104.8 High relevance — show source text
[A] 104.8 Liability. The code official, member of the Board of Appeals, officer or employee charged with the enforcement of this code, while acting for the jurisdiction in good faith and without malice in the discharge of the duties required by this code or other pertinent law or ordinance, shall not thereby be rendered personally liable, either civilly or criminally, and is hereby relieved from personal liability for any damage accruing to persons or property as a result of any act or by reason of an act or omission in the discharge of official duties.

[A] 104.8.1 Legal defense. Any suit or criminal complaint instituted against any officer or employee because of an act performed by that officer or employee in the lawful discharge of duties and under the provisions of this code or other laws or ordinances implemented through the enforcement of this code shall be defended by legal representatives of the jurisdiction until the final termination of the proceedings. The code official or any subordinate shall not be liable for cost in any action, suit or proceeding that is instituted in pursuance of the provisions of this code.

[A] 104.9 Approved materials and equipment. Materials, equipment and devices approved by the code official shall be constructed and installed in accordance with such approval.

1-24 2025 CALIFORNIA EXISTING BUILDING CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

ADMINISTRATION

[A] 104.9.1 Materials and equipment reuse. Materials, equipment and devices shall not be reused unless such elements are in good working condition and approved.

SECTION 105—PERMITS

[A] 105.1 Required. Any owner or owner’s authorized agent who intends to repair, add to, alter, relocate, demolish or change the occupancy of a building or to repair, install, add, alter, remove, convert or replace any electrical, gas, mechanical or plumbing system, the installation of which is regulated by this code, or to cause any such work to be performed, shall first make application to the code official and obtain the required permit.

[A] 105.1.1 Annual permit. Instead of an individual permit for each alteration to an already approved electrical, gas, mechanical, or plumbing installation, the code official is authorized to issue an annual permit on application therefor to any person, firm or corporation regularly employing one or more qualified trade persons in the building, structure, or on the premises owned or operated by the applicant for the permit.

[A] 105.1.2 Annual permit records. The person to whom an annual permit is issued shall keep a detailed record of alterations made under such annual permit. The code official shall have access to such records at all times, or such records shall be filed with the code official as designated.

[A] 105.2 Work exempt from permit. Exemptions from permit requirements of this code shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or ordinances of this jurisdiction. Permits shall not be required for the following:
CMC § 8.10 High relevance — show source text
1.8.10 Other Building Regulations . . . . . . . . . . . . . . . . . . . . . . 1-13

1.9 Division of the State Architect . . . . . . . . . . . . . . . . . . . . 1-13

1.10 Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.11 Office of the State Fire Marshal . . . . . . . . . . . . . . . . . . . 1-17

1.12 State Librarian. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

1.13 Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

1.14 California State Lands Commission . . . . . . . . . . . . . . . 1-22

DIVISION II – SCOPE AND ADMINISTRATION . . . . . . . . . . . . 1-23

Part 1—Scope and Application. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

101 Scope and General Requirements. . . . . . . . . . . . . . . 1-23

102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Part 2—Administration and Enforcement . . . . . . . . . . . . . . . . . 1-24

103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . . 1-24

104 Duties and Powers of Building Official. . . . . . . . . . . 1-25

105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

106 Floor and Roof Design Loads . . . . . . . . . . . . . . . . . . . 1-29

107 Construction Documents . . . . . . . . . . . . . . . . . . . . . . 1-29

108 Temporary Structures, Equipment and Systems . . . . . . . . . . . . . . . . . . . . . 1-31

109 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

110 Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

111 Certificate of Occupancy. . . . . . . . . . . . . . . . . . . . . . . 1-33
CMC § 1-12 High relevance — show source text
1.9 Division of the State Architect . . . . . . . . . . . . . . . . . . . . 1-12

1.10 Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

1.11 Office of the State Fire Marshal . . . . . . . . . . . . . . . . . . . 1-15

1.12 State Librarian. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

1.13 Department of Water Resources . . . . . . . . . . . . . . . . . . 1-20

1.14 California State Lands Commission . . . . . . . . . . . . . . . 1-20

DIVISION II – SCOPE AND ADMINISTRATION . . . . . . . . . . . . . . . . . 1-21

PART 1—SCOPE AND APPLICATION. . . . . . . . . . . . . . . . . . . . . . . 1-21

101 Scope and General Requirements. . . . . . . . . . . . . . . 1-21

102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

PART 2—ADMINISTRATION AND ENFORCEMENT . . . . . . . . . . . 1-22

103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . . 1-22

104 Duties and Powers of Code Official. . . . . . . . . . . . . . 1-22

105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

106 Construction Documents . . . . . . . . . . . . . . . . . . . . . . 1-26

107 Temporary Uses, Equipment and Systems. . . . . . . 1-28

108 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

109 Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

110 Certificate of Occupancy. . . . . . . . . . . . . . . . . . . . . . . 1-30

111 Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

112 Means of Appeals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30
CMC § 104.5 High relevance — show source text
[A] 104.5 Identification. The building official shall carry proper identification when inspecting structures or premises in the performance of duties under this code.

[A] 104.6 Notices and orders. The building official shall issue necessary notices or orders to ensure compliance with this code. Notices of violations shall be in accordance with Section 114.

[A] 104.7 Official records. The building official shall keep official records as required by Sections 104.7.1 through 104.7.5. Such official records shall be retained for not less than 5 years or for as long as the building or structure to which such records relate remains in existence, unless otherwise provided by other regulations.

[A] 104.7.1 Approvals. A record of approvals shall be maintained by the building official and shall be available for public inspection during business hours in accordance with applicable laws.

[A] 104.7.2 Inspections. The building official shall keep a record of each inspection made, including notices and orders issued, showing the findings and disposition of each.

[A] 104.7.3 Code alternatives and modifications. Application for alternative materials, design and methods of construction and equipment in accordance with Section 104.2.3; modifications in accordance with Section 104.2.4; and documentation of the final decision of the building official for either shall be in writing and shall be retained in the official records.

[A] 104.7.4 Tests. The building official shall keep a record of tests conducted to comply with Sections 104.2.2.4 and 104.2.3.5.

[A] 104.7.5 Fees. The building official shall keep a record of fees collected and refunded in accordance with Section 109.

[A] 104.8 Liability. The building official, member of the board of appeals or employee charged with the enforcement of this code, while acting for the jurisdiction in good faith and without malice in the discharge of the duties required by this code or other pertinent law or ordinance, shall not thereby be rendered personally liable, either civilly or criminally, and is hereby relieved from personal liability for any damage accruing to persons or property as a result of any act or by reason of any act or omission in the discharge of official duties.

[A] 104.8.1 Legal defense. Any suit or criminal complaint instituted against any officer or employee because of an act performed by that officer or employee in the lawful discharge of duties under the provisions of this code or other laws or ordinances implemented through the enforcement of this code shall be defended by legal representatives of the jurisdiction until the final termination of the proceedings. The building official or any subordinate shall not be liable for costs in an action, suit or proceeding that is instituted in pursuance of the provisions of this code.

[A] 104.9 Approved materials and equipment. Materials, equipment and devices approved by the building official shall be constructed and installed in accordance with such approval.

[A] 104.9.1 Materials and equipment reuse. Materials, equipment and devices shall not be reused unless such elements are in good working condition and approved.

SECTION 105—PERMITS
CMC § 1-24 High relevance — show source text
102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Part 2—Administration and Enforcement . . . . . . . . . . . . . . . . . 1-24

103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . . 1-24

104 Duties and Powers of Building Official. . . . . . . . . . . 1-25

105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

106 Floor and Roof Design Loads . . . . . . . . . . . . . . . . . . . 1-29

107 Construction Documents . . . . . . . . . . . . . . . . . . . . . . 1-29

108 Temporary Structures, Equipment and Systems . . . . . . . . . . . . . . . . . . . . . 1-31

109 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

110 Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

111 Certificate of Occupancy. . . . . . . . . . . . . . . . . . . . . . . 1-33

112 Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

113 Means of Appeals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

114 Violations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34

115 Stop Work Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34

CHAPTER 2 DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

201 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

202 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

CHAPTER 3 OCCUPANCY CLASSIFICATION AND USE . . . . .3-1

301 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

302 Occupancy Classification and Use Designation . . . . 3-3
CMC § 1-4 High relevance — show source text
1.11 Office of the State Fire Marshal . . . . . . . . . . . . . . . . . . . 1-4

1.12 Board of Forestry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

DIVISION II SCOPE AND ADMINISTRATION . . . . . . . . . . . . . 1-15

PART 1—GENERAL PROVISIONS. . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

101 Scope and General Requirements. . . . . . . . . . . . . . 1-15

102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

PART 2—ADMINISTRATION AND ENFORCEMENT . . . . . . . . . . . 1-17

103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . 1-17

104 Duties and Powers of the Code Official . . . . . . . . . 1-17

105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

106 Construction Documents . . . . . . . . . . . . . . . . . . . . . 1-20

107 Temporary Uses, Equipment and Systems . . . . . . 1-21

108 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

109 Inspection and Enforcement . . . . . . . . . . . . . . . . . . 1-22

110 Certificate of Completion . . . . . . . . . . . . . . . . . . . . . 1-24

111 Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

112 Means of Appeals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

113 Stop Work Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

CHAPTER 2 DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

201 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

202 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

CHAPTER 3 WILDLAND-URBAN INTERFACE AREAS . . . . 3-3
CMC § 1-22 High relevance — show source text
PART 2—ADMINISTRATION AND ENFORCEMENT . . . . . . . . . . . 1-22

103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . . 1-22

104 Duties and Powers of Code Official. . . . . . . . . . . . . . 1-22

105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

106 Construction Documents . . . . . . . . . . . . . . . . . . . . . . 1-26

107 Temporary Uses, Equipment and Systems. . . . . . . 1-28

108 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

109 Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

110 Certificate of Occupancy. . . . . . . . . . . . . . . . . . . . . . . 1-30

111 Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

112 Means of Appeals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

113 Violations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

114 Stop Work Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

115 Unsafe Structures and Equipment . . . . . . . . . . . . . . 1-31

116 Emergency Measures . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

117 Demolition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

CHAPTER 2 DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

201 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

202 General Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

CHAPTER 3 PROVISIONS FOR ALL COMPLIANCE

METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

301 Administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
CMC § 102.6.2 Medium relevance — show source text
[A] 102.6.2 Buildings previously occupied. The legal occupancy of any building existing on the date of adoption of this code shall be permitted to continue without change, except as otherwise specifically provided in this code, the California Fire Code or California Existing Building Code, or as is deemed necessary by the building official for the general safety and welfare of the occupants and the public.

PART 2—ADMINISTRATION AND ENFORCEMENT

SECTION 103—CODE COMPLIANCE AGENCY

[A] 103.1 Creation of enforcement agency. The [ INSERT NAME OF DEPARTMENT ] is hereby created and the official in charge thereof shall be known as the building official. The function of the agency shall be the implementation, administration and enforcement of the provisions of this code.

[A] 103.2 Appointment. The building official shall be appointed by the chief appointing authority of the jurisdiction.

[A] 103.3 Deputies. In accordance with the prescribed procedures of this jurisdiction and with the concurrence of the appointing authority, the building official shall have the authority to appoint a deputy building official, other related technical officers, inspectors and other employees. Such employees shall have powers as delegated by the building official.

1-24 2025 CALIFORNIA BUILDING CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

ADMINISTRATION

SECTION 104—DUTIES AND POWERS OF BUILDING OFFICIAL

[A] 104.1 General. The building official is hereby authorized and directed to enforce the provisions of this code.

[A] 104.2 Determination of compliance. The building official shall have the authority to determine compliance with this code, to render interpretations of this code and to adopt policies and procedures in order to clarify the application of its provisions. Such interpretations, policies and procedures:
1. Shall be in compliance with the intent and purpose of this code.
2. Shall not have the effect of waiving requirements specifically provided for in this code.
[A] 104.2.1 Listed compliance. Where this code or a referenced standard requires equipment, materials, products or services to be listed and a listing standard is specified, the listing shall be based on the specified standard. Where a listing standard is not specified, the listing shall be based on an approved listing criteria. Listings shall be germane to the provision requiring the listing. Installation shall be in accordance with the listing and the manufacturer’s instructions, and where required to verify compliance, the listing standard and manufacturer’s instructions shall be made available to the building official.

[A] 104.2.2 Technical assistance. To determine compliance with this code, the building official is authorized to determine compliance with this code, to require the owner or owner’s authorized agent to provide a technical opinion and report.

[A] 104.2.2.1 Cost. A technical opinion and report shall be provided without charge to the jurisdiction.

[A] 104.2.2.2 Preparer qualifications. The technical opinion and report shall be prepared by a qualified engineer, specialist, laboratory or specialty organization acceptable to the building official. The building official is authorized to require design submittals to be prepared by, and bear the stamp of, a registered design professional.
CMC § 909.12.4 Medium relevance — show source text
[F] 909.12.4 Automatic control. Where completely automatic control is required or used, the automatic-control sequences shall be initiated from an appropriately zoned automatic sprinkler system complying with Section 903.3.1.1, manual controls provided with ready access for the fire department and any smoke detectors required by engineering analysis.

[F] 909.13 Control air tubing. Control air tubing shall be of sufficient size to meet the required response times. Tubing shall be flushed clean and dry prior to final connections and shall be adequately supported and protected from damage. Tubing passing through concrete or masonry shall be sleeved and protected from abrasion and electrolytic action.

[F] 909.13.1 Materials. Control-air tubing shall be hard-drawn copper, Type L, ACR in accordance with ASTM B42, ASTM B43, ASTM B68/B68M, ASTM B88, ASTM B251 and ASTM B280. Fittings shall be wrought copper or brass, solder type in accordance with ASME B16.18 or ASME B16.22. Changes in direction shall be made with appropriate tool bends. Brass compression-type fittings shall be used at final connection to devices; other joints shall be brazed using a BCuP-5 brazing alloy with solidus above 1,100°F (593°C) and liquids below 1,500°F (816°C). Brazing flux shall be used on copper-to-brass joints only.

Exception: Nonmetallic tubing used within control panels and at the final connection to devices provided that all of the following conditions are met:
1. Tubing shall comply with the requirements of Chapter 6 of the California Mechanical Code .
2. Tubing and connected devices shall be completely enclosed within a galvanized or paint-grade steel enclosure having a minimum thickness of 0.0296 inch (0.7534 mm) (No. 22 gage). Entry to the enclosure shall be by copper tubing with a protective grommet of neoprene or Teflon or by suitable brass compression to male barbed adapter.
3. Tubing shall be identified by appropriately documented coding.
4. Tubing shall be neatly tied and supported within the enclosure. Tubing bridging cabinets and doors or moveable devices shall be of sufficient length to avoid tension and excessive stress. Tubing shall be protected against abrasion. Tubing connected to devices on doors shall be fastened along hinges.
[F] 909.13.2 Isolation from other functions. Control tubing serving other than smoke control functions shall be isolated by automatic isolation valves or shall be an independent system.

[F] 909.13.3 Testing. Control air tubing shall be tested at three times the operating pressure for not less than 30 minutes without any noticeable loss in gauge pressure prior to final connection to devices.

[F] 909.14 Marking and identification. The detection and control systems shall be clearly marked at all junctions, accesses and terminations.

[F] 909.15 Control diagrams. Identical control diagrams showing all devices in the system and identifying their location and function shall be maintained current and kept on file with the fire code official, the fire department and in the fire command center in a format and manner approved by the fire code official.
CMC § 104.1 High relevance — show source text
[A] 104.1 General. The building official is hereby authorized and directed to enforce the provisions of this code.

[A] 104.2 Determination of compliance. The building official shall have the authority to determine compliance with this code, to render interpretations of this code and to adopt policies and procedures in order to clarify the application of its provisions. Such interpretations, policies and procedures:
1. Shall be in compliance with the intent and purpose of this code.
2. Shall not have the effect of waiving requirements specifically provided for in this code.
[A] 104.2.1 Listed compliance. Where this code or a referenced standard requires equipment, materials, products or services to be listed and a listing standard is specified, the listing shall be based on the specified standard. Where a listing standard is not specified, the listing shall be based on an approved listing criteria. Listings shall be germane to the provision requiring the listing. Installation shall be in accordance with the listing and the manufacturer’s instructions, and where required to verify compliance, the listing standard and manufacturer’s instructions shall be made available to the building official.

[A] 104.2.2 Technical assistance. To determine compliance with this code, the building official is authorized to determine compliance with this code, to require the owner or owner’s authorized agent to provide a technical opinion and report.

[A] 104.2.2.1 Cost. A technical opinion and report shall be provided without charge to the jurisdiction.

[A] 104.2.2.2 Preparer qualifications. The technical opinion and report shall be prepared by a qualified engineer, specialist, laboratory or specialty organization acceptable to the building official. The building official is authorized to require design submittals to be prepared by, and bear the stamp of, a registered design professional.

[A] 104.2.2.3 Content. The technical opinion and report shall analyze the properties of the design, operation or use of the building or premises and the facilities and appurtenances situated thereon to identify and propose necessary recommendations.

[A] 104.2.2.4 Tests. Where there is insufficient evidence of compliance with the provisions of this code, the building official shall have the authority to require tests as evidence of compliance. Test methods shall be as specified in this code or by other recognized test standards. In the absence of recognized test standards, the building official shall approve the testing procedures. Such tests shall be performed by a party acceptable to the building official.

[A] 104.2.3 Alternative materials, design and methods of construction and equipment. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved.

Exception: Performance-based alternative materials, designs or methods of construction and equipment complying with the International Code Council Performance Code . This exception shall not apply to alternative structural materials or to alternative structural designs. [DSA-SS, DSA-SS/CC] The International Code Council Performance Code is not permitted by DSA.

[DSA-SS, DSA-SS/CC & OSHPD 1, 1R, 2, 4 & 5] Alternative system shall satisfy ASCE 7 Section 1.3, unless more restrictive require- ments are established by this code for an equivalent system.

[DSA-SS, DSA-SS/CC] Alternative systems shall also satisfy the California Administrative Code, Section 4-304.

CMC § 701A.1 Medium relevance — show source text

1_|Title|Y||||||||| |101.2|Scope|Y||701A.1|4901.1|||||| |101.2.1|Appendices|N||||||||| |101.3|Purpose|N||701A.2|4901.2|||||| |101.3.1|Application|Y||701A.3||||||| |101.3.1.1|Application date and
where required|Y||701A.3.1||||||| |101.4|Retroactivity|N||||||||| |101.5|Additions or
alterations|N||||||||| |101.6|Maintenance|Y||||||||| |102|Applicability|Y||||||||| |102.1|General|Y||||||||| |102.2|Other laws|Y||||||||| |102.3|Application of
references|N||||||||| |102.4|Referenced codes
and standards|N||||||||| |102.4.1|Conflicts|N||||||||| |102.4.2|Provisions in
referenced codes and
standards|N||||||||| |102.5|Subjects not
regulated by this code|N|||102.8|||||| |102.6|Matters not provided
for|Y|||102.9|||||| |102.7|Partial invalidity|N||||||||| |102.8|Existing conditions|N||||||||| |103|Code compliance
agency|N||||||||| |103.1|Creation of agency|N||||||||| |103.2|Appointment|N||||||||| |103.3|Deputies|N||||||||| |104|Duties and powers of
the code official|N||||||||| |104.1|Powers and duties of
the code official|N||||||||| |104.2|Determination of
compliance|N||||||||| |104.2.1|Technical assistance|N||||||||| |104.2.1.1|Cost|N|||||||||

2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE APPENDIX H-21

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

APPENDIX H—REFERENCED CALIFORNIA DOCUMENTS

2025 CWUIC—continued	Col2	Adopted Yes/No	IWUIC Section	CBC Section	CFC Section	Title 14, Division 1.5 Section	Title 19, Division 1 Section	Gov Code Section	PRC Section	HSC Section
Section	Title	Title	Title	Title	Title	Title	Title	Title	Title	Title
Chapter 1	_Division II—_Scope and Administration	_Division II—_Scope and Administration	_Division II—_Scope and Administration	_Division II—_Scope and Administration	_Division II—_Scope and Administration	_Division II—_Scope and Administration	_Division II—_Scope and Administration	_Division II—_Scope and Administration	_Division II—_Scope and Administration	_Division II—_Scope and Administration
104.2.1.

CMC § 103.1 Medium relevance — show source text
PART 2—ADMINISTRATION AND ENFORCEMENT

SECTION 103—CODE COMPLIANCE AGENCY

[A] 103.1 Creation of agency. The [ INSERT NAME OF DEPARTMENT ] is hereby created and the official in charge thereof shall be known as the fire code official. The function of the agency shall be the implementation, administration and enforcement of the provisions of this code.

[A] 103.2 Appointment. The fire code official shall be appointed by the chief appointing authority of the jurisdiction.

[A] 103.3 Deputies. In accordance with the prescribed procedures of this jurisdiction and with the concurrence of the appointing authority, the fire code official shall have the authority to appoint a deputy fire code official, other related technical officers, inspectors and other employees. Such employees shall have powers as delegated by the fire code official.

SECTION 104—DUTIES AND POWERS OF THE FIRE CODE OFFICIAL

[A] 104.1 General. The fire code official is hereby authorized to enforce the provisions of this code.

[A] 104.2 Determination of compliance. The fire code official shall have the authority to determine compliance with this code, to render interpretations of this code and to adopt policies and procedures in order to clarify the application of its provisions. Such interpretations, policies and procedures:
1. Shall be in compliance with the intent and purpose of this code.
2. Shall not have the effect of waiving requirements specifically provided for in this code.
1-14 2025 CALIFORNIA FIRE CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

DIVISION II—SCOPE AND ADMINISTRATION

[A] 104.2.1 Listed compliance. Where this code or a referenced standard requires equipment, materials, products or services to be listed and a listing standard is specified, the listing shall be based on the specified standard. Where a listing standard is not specified, the listing shall be based on an approved listing criteria. Listings shall be germane to the provision requiring the listing. Installation shall be in accordance with the listing and the manufacturer’s instructions, and where required to verify compliance, the listing standard and manufacturer’s instructions shall be made available to the fire code official.

[A] 104.2.2 Technical assistance. To determine compliance with this code, the fire code official is authorized to require the owner or owner’s authorized agent to provide a technical opinion and report.

[A] 104.2.2.1 Cost. A technical opinion and report shall be provided without charge to the jurisdiction.

[A] 104.2.2.2 Preparer qualifications. The technical opinion and report shall be prepared by a qualified engineer, specialist, laboratory or fire safety specialty organization acceptable to the fire code official. The fire code official is authorized to require design submittals to be prepared by, and bear the stamp of, a registered design professional.

[A] 104.2.2.3 Content. The technical opinion and report shall analyze the properties of the design, operation or use of the building or premises and the facilities and appurtenances situated thereon to identify and propose necessary recommendations.
CMC § 1-3 Medium relevance — show source text
Appendix G Voluntary Home-Hardening Recommendations.

Appendix G is an informational appendix that provides discussion of some elements of the proposed self-defense mechanisms and their role in enhancing the protection of exposed structures in the wildland-urban interface. The items provided in this appendix provide owners with suggestions for increasing the survivability of their structure. These items are not mandatory but can be considered by owners to increase the safety of structures.

Appendix H Referenced California Documents.

Appendix H contains portions of California statutes and regulations located in other documents. They are reprinted in Appendix H to aid the user in understanding the requirements applicable to wildland-urban interface areas and to provide a background for the provi- sions. Much of the text in the CWUIC is based on the requirements found in these other documents.

Appendix I Board of Appeals.

Appendix I contains the provisions for appeal and the establishment of a board of appeals. The provisions include the application for an appeal, the makeup of the board of appeals and the conduct of the appeal process.

xii 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

CONTENTS

CHAPTER 1 ADMINISTRATION. . . . . . . . . . . . . . . . . . . . . . .1-3

DIVISION I CALIFORNIA ADMINISTRATION

1.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.11 Office of the State Fire Marshal . . . . . . . . . . . . . . . . . . . 1-4

1.12 Board of Forestry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

DIVISION II SCOPE AND ADMINISTRATION . . . . . . . . . . . . . 1-15

PART 1—GENERAL PROVISIONS. . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

101 Scope and General Requirements. . . . . . . . . . . . . . 1-15

102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

PART 2—ADMINISTRATION AND ENFORCEMENT . . . . . . . . . . . 1-17

103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . 1-17

104 Duties and Powers of the Code Official . . . . . . . . . 1-17

105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

106 Construction Documents . . . . . . . . . . . . . . . . . . . . . 1-20

107 Temporary Uses, Equipment and Systems . . . . . . 1-21
CMC § 517.34. Medium relevance — show source text
12. Transformers.

13. Electrical substations.

14. UPS and batteries.

15. Panelboards as defined in the California Electrical Code (CEC) Article 100. 16. Industrial control panels as defined in the California Electrical Code (CEC) Article 100. 17. Power isolation and correction systems. 18. Motorized surgical lighting systems. 19. Motorized operating table systems. 20. Internal communication servers, routers and switches failure of which could impair the continued operation of the facility. 21. Medical gas and vacuum systems. 22. Electrical busways as defined in UL 857. 23. Electrical control panels powered by the life safety branch in accordance with the California Electrical Code (CEC) Article 517.33 or the critical branch in accordance with the California Electrical Code (CEC) Article 517.34.

Exceptions: 1. Equipment and components weighing not more than 75 lbs. rigidly attached to structures or surface mounted on equipment or components that are not required to have special seismic certification by this section. 2. Mobile equipment/components. 3. Pipes, ducts, conduits and cable trays, excluding in-line equipment and components. 4. Underground tanks. 5. Electric motors, base-mounted horizontal pumps and compressors. 6. Based-mounted vertical pumps up to 20 hp. 7. Substitution of certified active subcomponents up to operating weight of 10 lbs. 8. Components where importance factor, I p , is permitted to be 1.0 by this code. 9. Emergency generators up to 25 kilowatts. 10. Equipment and components used for clinical trials only. 11. Elevator machines and governors. 12. Temporary and Interim equipment.

For Exceptions 5, 6 and 7:

Exempt subcomponents, which are an integral part of equipment that require special seismic certification, shall be tested attached to the equipment. Exempt subcomponents shall be permitted to be substituted without testing, provided that the substituted subcomponent relative to the certified subcomponent has: 1. Similar configuration with equivalent function. 2. Supports and attachments of similar configuration with equivalent strength and stiffness.

3. Same attachment location.

2025 CALIFORNIA BUILDING CODE 17A-19

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

�

�

SPECIAL INSPECTIONS AND TESTS

4. Changes in dimensions, center of gravity and mass, of not more than 10 percent of the certified subcomponent and still meets Exception 5, 6 or 7. 5. Manufacturing process with ISO 9001 certification.

1705 A .14.4 Seismic isolation and damping systems. Seismic isolation and damping systems in structures assigned to Seismic Design Category D, E or F shall be tested in accordance with Section 17.8 and 18.6 of ASCE 7.

Prototype and production testing and associated acceptance criteria for isolator units and damping devices shall be subject to preapproval by the building official. Testing exemption for similar units shall require approval by the building official.
CMC § 104.1 High relevance — show source text
SECTION 104—DUTIES AND POWERS OF CODE OFFICIAL

[A] 104.1 General. The code official is hereby authorized and directed to enforce the provisions of this code.

[A] 104.2 Determination of compliance. The code official shall have the authority to determine compliance with this code, to render interpretations of this code and to adopt policies and procedures in order to clarify the application of this code’s provisions. Such interpretations, policies, and procedures:
1. Shall be in compliance with the intent and purpose of this code.
2. Shall not have the effect of waiving requirements specifically provided for in this code.
[A] 104.2.1 Listed compliance. Where this code or a referenced standard requires equipment, materials, products or services to be listed and a listing standard is specified, the listing shall be based on the specified standard. Where a listing standard is not specified, the listing shall be based on an approved listing criteria. Listings shall be germane to the provision requiring the listing. Installation shall be in accordance with the listing and the manufacturer’s instructions, and where required to verify compliance, the listing standard and manufacturer’s instructions shall be made available to the code official.

[A] 104.2.2 Technical assistance. To determine compliance with this code, the code official is authorized to require the owner or owner’s authorized agent to provide a technical opinion and report.

[A] 104.2.2.1 Cost. A technical opinion and report shall be provided without charge to the jurisdiction.

[A] 104.2.2.2 Preparer qualifications. The technical opinion and report shall be prepared by a qualified engineer, specialist, laboratory or fire safety specialty organization acceptable to the code official. The code official is authorized to require design submittals to be prepared by, and bear the stamp of, a registered design professional.

[A] 104.2.2.3 Content. The technical opinion and report shall analyze the properties of the design, operation or use of the building or premises and the facilities and appurtenances situated thereon to identify and propose necessary recommendations.

[A] 104.2.2.4 Tests. Where there is insufficient evidence of compliance with the provisions of this code, the code official shall have the authority to require tests as evidence of compliance. Test methods shall be as specified in this code or by other recognized test standards. In the absence of recognized test standards, the code official shall approve the testing procedures. Such tests shall be performed by a party acceptable to the code official.

1-22 2025 CALIFORNIA EXISTING BUILDING CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

ADMINISTRATION

[A] 104.2.3 Alternative materials, design and methods of construction, and equipment. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative is not specifically prohibited by this code and has been approved.

Exception: Performance-based alternative materials, designs or methods of construction and equipment complying with the ICC Performance Code. This exception shall not apply to alternative structural materials or to alternative structural designs.

[A] 104.2.3.1 Approval authority. An alternative material, design or method of construction shall be approved where the code official finds that the proposed alternative is satisfactory and complies with Sections 104.2.3.2 through 104.2.3.7, as applicable.
CMC § 120.4 Medium relevance — show source text
120.4(a), 140.4(c), 140.4(e), 140.4(f), 140.4(n),

Shut-off 120.2(g), 120.6(d), 120.9(a), 130.1(c), 130.4(a), 130.5(d), 140.4(n), 160.3(a), 160.4(e), 160.5(b), 160.5(e), 160.6(d), 170.2(c) Shut-Off and Reset 120.2(e), 160.3(a)2 Sidelit Daylit Zone 130.1(d), 140.3(a)5, 140.3(c), 140.6(a), Table 140.6-A, 160.5(b)4D, 170.2(a)3, 170.2(b), 170.2(e) Siding 150.2(a)1B, 180.1(a) Sign 130.2(b), 140.7(a), 140.7(c) Double-faced signs 140.8(a), 170.2(e)7 Electronic Message Center (EMC) 110.12(d), 130.3(a), 140.8(b)6, 160.5(d) Externally illuminated sign 140.8(a), 140.8(b)6, 141.0, 141.0(b)2F, G, H, 141.0(b)2M, N, O, 170.2(e)7, 180.0, 180.2(b)4 Internally illuminated sign 140.8(a), 140.8(b)6, 141.0(b)2F, G, H, 141.0(b)2M, N, O, 150.0(k)4, 170.2(e)7 Traffic sign 140.7(a), 140.7(c), 140.8(b)6 Unfiltered neon 140.8(a), 170.2(d)7 Significant Contaminant 160.2(c)8 Single Family buildings 150.0, 150.1, 150.2, 110.10(a), 110.10(b)1A, 110.10(c), 110.6(a)6, 110.8(d)1, 150.0(k)3, 150.0(s), 150.1(a), 150.1(c)1, 150.1(c)11, 150.1(c)14, 150.2(a) Phase 120.6(a)3 Pole circuit breaker space 150.0(n), 160.4(a) Pole double throw 140.6(a)1, 170.2(e)2 Side opening 160.2(c)2 Zone air conditioner 160.3(d)1 Zone central forced air system 150.0(m)13, 160.3(b)G-L Zone damper 120.1(d), 160.2(c)5 Zone heat pump 120.2(b) Zone space conditioning system 120.4(g), 140.4(a) cabinet 140.4(c)1 Site-Recovered 140.4(d), 140.4(g) Site-Solar Energy 140.4(d), 140.4(g) Sizing(Equipment) 140.4(a), 150.0(h), 160.3(b)2, 170.

Frequently asked questions

Who is the “code official”?

The code official is the appointed official in charge of the jurisdiction’s code compliance agency; that official implements, administers and enforces the code. See § 103.1 and the administration notes for appointment and deputies.

Can the code official waive a code requirement if it’s impractical?

No. Interpretations and policies adopted by the code official must conform to the code’s intent and shall not have the effect of waiving requirements specifically provided in the code. § 104.2.

If my project uses a non‑standard product, who pays for testing or reports?

The owner or owner’s authorized agent must provide the required technical opinion and report without charge to the jurisdiction. § 104.2.1.1.

Must alternative‑method approvals be written?

Yes — requests must be submitted in writing and if the code official denies the request, the official must respond in writing stating the reasons. § 104.2.2.2.

Does the code official keep records of approvals and inspections?

Yes — the building/mechanical official keeps records of approvals, inspections, notices/orders, tests and fees and retains them per the record retention provisions. § 104.7 (see Building Code example).

Ask about the CMC

Get cited, plain-English answers on the California Mechanical Code for your project — any code section, any scenario.

Start Free Trial

Related in the CMC

How do appeals and boards of appeal work under the CMC?

What is the Code Compliance Agency and its role?

Authority & Responsibilities

California Mechanical Code