CWUIC · California Wildland-Urban Interface Code

How do I use the CWUIC cross-reference tool (Appendix H107) to find source documents?

Appendix H, **§ H107**, is a lookup table in the CWUIC that lists each CWUIC section and points to the original California code or regulation sections (CBC, CFC, Title 14/19, Gov Code, PRC, HSC). Use H107 to find the authoritative source, then read the cited source section(s) for exact, enforceable requirements; remember appendices only apply if your jurisdiction adopts them.

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Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

The Cross Reference Tool in Appendix H (§ H107) provides a matrix that maps each CWUIC section to the original California source document and the specific source section where the language originated. § H107 makes clear that some CWUIC provisions are derived from more than one source and that the matrix is intended to identify those source documents so users can consult the original texts for full, authoritative requirements.

Use § H107 as a lookup: it tells you which California statute or regulation to read for the authoritative text — the matrix points to the source, it does not replace the source document.

Requirements in detail

What the matrix is and what it contains

  • The tool is a matrix (table) listing each CWUIC section in the leftmost column and columns for various California source documents (for example CBC, CFC, Title 14 Division 1.5, Title 19 Division 1, Government Code, PRC, HSC) where the originating language appears. § H107 states this purpose explicitly.
  • The matrix also shows whether a provision was adopted (Yes/No) into the CWUIC, and may list multiple source sections where one CWUIC section was drawn from. § H107 notes that some sections are derived from more than one source and were editorially massaged to coalesce with other provisions.

How to read each column (decision-relevant dimensions)

  • CWUIC section — the section number or appendix item in the CWUIC.
  • Source document type — which California code or regulation (CBC, CFC, Title 14, Title 19, Gov Code, PRC, HSC).
  • Source section — the exact section number in that source document (e.g., HSC §4293).
  • Adopted (Yes/No) — whether this CWUIC item was adopted or is informational (appears in the matrix).
  • Notes / Multiple sources — indicates when more than one source contributed to the CWUIC language.
Decision variable Possible values What to do with it Code Reference
CWUIC section e.g., 1.1.1, A102.3.2.2 Locate the row for the CWUIC section you need see § H107
Source document type CBC, CFC, Title 14, Title 19, Gov Code, PRC, HSC Go to that California code or regulation to read authoritative text listed in the matrix (Appendix § H107)
Source section e.g., 1.1.1, 4293 Use the cited section number to find the exact requirement in the source present in the row for each CWUIC item (Appendix § H107)
Adopted? Yes / No If No, treat the CWUIC text as informational unless your jurisdiction has adopted the appendix appendices apply only if adopted — see § 101.2.1
Multiple sources? Yes / No When Yes, consult each listed source for full context and precedence noted in the matrix; § H107 warns of multiple-source derivations

Practical reading tips

  • First, confirm the CWUIC section number you are using (left column). § H107 is organized by CWUIC section, not by source document.
  • Second, read across the row to find the source document and source section number. Follow those pointers to the original code/ statute.
  • Third, treat the source document as the controlling authority for precise wording, exceptions, definitions, and effective dates. § H107 is a pointer, not a substitute.

Exceptions & special cases

  • Appendices (including Appendix H) do not apply unless they have been specifically adopted by the jurisdiction. See § 101.2.1 — "Provisions in the appendices shall not apply unless specifically adopted." That means the matrix is informational in jurisdictions that have not adopted Appendix H.
  • Some CWUIC sections were assembled from multiple source sections; the matrix will list multiple source citations for that CWUIC section. When multiple sources are shown, you must check all cited source sections for conflicting language or differing limited exceptions; § H107 warns that language was sometimes editorially massaged to coalesce with other provisions.
  • The matrix indicates Adopted: Yes/No. If an entry shows No, do not assume the CWUIC wording creates an enforceable requirement unless your local jurisdiction separately adopted that appendix item. The matrix itself documents adoption status.

Common mistakes

  • Assuming the H107 table is the authoritative text. It is a cross-reference tool; the original statute or regulation is authoritative for compliance and enforcement. § H107 identifies the source but does not replace it.
  • Skipping the “Adopted” column or appendix-adoption check and applying un-adopted appendix provisions as if they were in force. Remember § 101.2.1: appendices apply only if adopted.
  • Stopping after finding one source when the matrix lists multiple source sections. § H107 explicitly notes some CWUIC provisions derive from more than one source. Check every cited source.
  • Not checking the source document’s latest effective date or local amendments (the matrix points to the source but does not substitute for research on current amendments). § H107 is a guide to where to look.

Worked example — how to use H107 step‑by‑step

Scenario: You are reviewing defensible-space clearance requirements listed in CWUIC Section A102.3.2.2 but need the original statutory text.

  1. Open Appendix H, locate the row for CWUIC A102.3.2.2 in the § H107 matrix. The matrix row for that CWUIC item shows the mapped source(s) (for example, HSC §4293 and §4296 are listed for certain vegetation/clearance items).
  2. Note the source document (here: Health and Safety Code) and the source section numbers (here: § 4293, § 4296). § H107 provides those citations in the same row as A102.3.2.2.
  3. Go to the Health and Safety Code and read § 4293 (and § 4296 if listed) to find the exact clearance distances, exemptions, or enforcement language — those numeric requirements are contained in the HSC, not in the H107 matrix. The H107 matrix only points you to which sections to read. (The numerical clearance amounts are not reproduced in H107; consult the cited HSC text itself.)

Result: H107 tells you precisely where to look in California law; the enforceable measurements and exceptions are in the cited HSC sections you must read next.

Related provisions

  • § H107 — Cross Reference Tool (Appendix H) — the matrix that points from CWUIC sections to source documents.
  • § H101 – H106 — other Appendix H entries that reprint or reference California documents (see Appendix H table of contents).
  • § 101.2.1 — “Appendices. Provisions in the appendices shall not apply unless specifically adopted.” (explains applicability of Appendix H).
  • § 1.12.2 — identifies that provisions applicable to WUI areas are identified in the body by Title 14 references and in the Cross Reference Table located in Appendix H, Section H107.

Code references

Grounded in the retrieved California Wildland-Urban Interface Code — click a citation to read the verbatim passage:

  • CWUIC § 18941.5 Medium relevance — show source text

    (a) (1) Amendments, additions, and deletions to the California Building Standards Code, including, but not limited to, green building standards, adopted by a city, county, or city and county pursuant to Section 18941.5 or pursuant to Section 17958.7, together with all applicable portions of the California Building Standards Code, shall become effective 180 days

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    APPENDIX H—REFERENCED CALIFORNIA DOCUMENTS

    after publication of the California Building Standards Code by the commission, or at a later date after publication estab- lished by the commission. (2) The publication date established by the commission shall be no earlier than the date the California Building Standards Code is available for purchase by the public. (b) Neither the State Building Standards Law contained in this part, nor the application of building standards contained in this section, shall limit the authority of a city, county, or city and county to establish more restrictive building standards, including, but not limited to, green building standards, reasonably necessary because of local climatic, geological, or topographical conditions. The governing body shall make the finding required by Section 17958.7 and the other requirements imposed by Section 17958.7 shall apply to that finding. Nothing in this section shall limit the authority of fire protection districts pursuant to subdivision (a) of Section 13869.7. Further, nothing in this section shall require findings required by Section 17958.7 beyond those currently required for more restrictive building standards related to housing.

    SECTION H107—CROSS REFERENCE TOOL

    The following matrix identifies each section in the California Wildland-Urban Interface Code and identifies the source document and section for the provisions. Some sections in this code are derived from more than one source and the language has been editorially massaged to coalesce and correlate with the other provisions in this code.

    2025 CWUIC 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 I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration
    1.1 General Y
    1.1.1 Title Y 1.1.1 1.1.1
    1.1.2 Purpose Y 1.1.2
    701A.2    		 1.1.2
    4901.
  • CWUIC § 3.1 Medium relevance — show source text

    3.1_|Maintenance and
    defensible space|Y||||||||| |Appendix H|Referenced California Documents|Referenced California Documents|Referenced California Documents|Referenced California Documents|Referenced California Documents|Referenced California Documents|Referenced California Documents|Referenced California Documents|Referenced California Documents|Referenced California Documents| ||General|N||||||||| |H101|California Civil Code|N||||||||| |H102|California Govern-
    ment Code|N||||||Various||| |H103|California Public
    Resources Code|N|||||||Various|| |H104|California Code of
    Regulations, Title 14,
    Division 1.5|N||||Various||||| |H104.1|Subchapter 2 State
    Minimum Fire Safe
    Regulations|N||||Subchapter 2||||| |H104.2|Subchapter 3 Fire
    Hazard|N||||Subchapter 3||||| |H105|California Code of
    Regulations, Title 19|N|||||2201|||| |H106|Health and Safety
    Code|N||||||||Various| |H107|Cross Reference Tool|N|||||||||

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    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
    Appendix I Board of Appeals Board of Appeals Board of Appeals Board of Appeals Board of Appeals Board of Appeals Board of Appeals Board of Appeals Board of Appeals Board of Appeals
    I101.1 Scope N
    I101.2 Application for appeal N
    I101.2.1 Limitation of
    authority    		 N
    I101.2.2 Stays of enforcement N
    I101.3 Membership of board N
    I101.3.1 Qualifications N
    I101.3.2 Alternate members N
    I101.3.3 Vacancies N
    I101.3.4 Chairperson N
    I101.3.5 Secretary N
    I101.3.6 Conflict of interest N
    I101.3.
  • CWUIC § 1.5 Medium relevance — show source text

    [California Code of Regulations, Title 14, Division 1.5, §1270.08] Distance Measurements.

    All specified or referenced distances are measured along the ground unless otherwise stated.

    1.12.2 Agency identification. The provisions of this code applicable to wildland-urban interface areas identified in Section 1.12 are identified in the body of the code by square brackets containing references to applicable Title 14 sections and in the Cross Reference Table located in Appendix H, Section H107.

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    DIVISION II

    SCOPE AND ADMINISTRATION

    User notes:

    About this chapter: Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. Chapter 1 is in two parts: Part 1–General Provisions (Sections 101–102) and Part 2—Administration and Enforcement (Sections 103–113). Section 101 identifies which buildings and structures come under its purview and references other California Codes as applicable.

    This code is intended to be adopted as a legally enforceable document and it cannot be effective without adequate provisions for its administration and enforcement. The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner.

    Note: Sections adopted or amended by state agencies are specifically indicated by an agency banner or indicated in the Matrix Adoption Table.

    PART 1—GENERAL PROVISIONS

    SECTION 101—SCOPE AND GENERAL REQUIREMENTS

    [A] 101.1 Title. These regulations shall be known as the California Wildland-Urban Interface Code of [ NAME OF JURISDICTION ], hereinafter referred to as “this code.”

    [A] 101.2 Scope. This code applies to building materials, systems and/or assemblies used in the exterior design and construction of new buildings located within a wildland-urban interface (WUI) area and contains minimum requirements to mitigate conditions that might cause a fire originating in a structure to ignite vegetation in the wildland-urban interface (WUI) area, and conversely, a wildfire burning in vegetative fuels to transmit fire to buildings and threaten to destroy life, overwhelm fire suppression capabilities or result in large property losses.

    [A] 101.2.1 Appendices. Provisions in the appendices shall not apply unless specifically adopted.

    [A] 101.3 Purpose. The purpose of this code is to establish minimum regulations for the safeguarding of life and for property protection. Regulations in this code are intended to mitigate the risk to life and structures from intrusion of fire from wildland fire exposures and fire exposures from adjacent structures and to mitigate structure fires from spreading to wildland fuels. The extent of this regulation is intended to be tiered commensurate with the relative level of hazard present.

    The unrestricted use of property in wildland-urban interface areas is a potential threat to life and property from fire and resulting erosion. Safeguards to prevent the occurrence of fires and to provide adequate fire protection facilities to control the spread of fire in wildland-urban interface areas shall be in accordance with this code.

  • CWUIC § 1-3 Medium relevance — show source text

    Appendix C contains a preliminary Community WUI Fire Hazard Evaluation Framework as a suggested methodology to begin to support communities at risk in the identification of their unique hazards and to provide common metrics for comparisons between communities. This preliminary framework includes information on community size, population and fuels; on notification and evacuation; and on the community infrastructure and firefighting response potential. Aspects of this framework may already be included in various community- level documents, such as Community Wildfire Protection Plans or evacuation plans. Development of a standard framework will (1) consolidate relevant WUI fire hazard and planning information in one place, and (2) allow for cross-community comparisons.

    The evaluation required to implement this framework will support prefire hazard assessment and during-fire response operations. An increased understanding of fire evacuation, fire structural response and fire defensive action relationships is needed to assess the over- all community WUI fire hazard. The quantification of these relationships will enable communities to optimize the community-level response to WUI fire hazards in a more integrated approach and result in increased life safety and reduced losses.

    Appendix D Model Ordinance for Fire Hazard Severity Zone Adoption.

    Appendix D is an informational appendix that is a sample ordinance designed as guidance for a city, county, city and county, or fire district to establish and designate fire hazard severity zones within their jurisdiction.

    Appendix E Reserved.

    Appendix F Characteristics of Fire-Smart Vegetation.

    Appendix F is an informational appendix provided for the convenience of the code user. It is simply a compilation of the eight characteristics of fire-smart vegetation that can be used effectively within wildland-urban interface areas to reduce the likelihood of fire spread through vegetation.

    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.

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    CONTENTS

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

    DIVISION I CALIFORNIA ADMINISTRATION

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

  • CWUIC § 0.42 Medium relevance — show source text

    Spacing of fasteners not included in this table shall be based on Table R602.3(2).
    f. For wood structural panel roof sheathing attached to gable end roof framing and to intermediate supports within 48 inches of roof edges and ridges, nails shall be spaced at 4
    inches on center where the ultimate design wind speed is greater than 130 mph in Exposure B or greater than 110 mph in Exposure C. Fastener spacing applies where roof
    framing specific gravity is 0.42 or larger. Where roof framing specific gravity is greater than or equal to 0.35 but less than 0.42 in accordance with AWC NDS, fastening of roof
    sheathing shall be with RSRS-03 (21/2″ × 0.131″ × 0.281″ head) nails.
    g. Gypsum sheathing shall conform to ASTM C1396 and shall be installed in accordance with ASTM C1280 or GA 253 . Fiberboard sheathing shall conform to ASTM C208.
    h. Spacing of fasteners on floor sheathing panel edges applies to panel edges supported by framing members and required blocking and at floor perimeters only. Spacing of fasteners
    on roof sheathing panel edges applies to panel edges supported by framing members and required blocking. Blocking of roof or floor sheathing panel edges perpendicular to the
    framing members need not be provided except as required by other provisions of this code. Floor perimeter shall be supported by framing members or solid blocking.
    i. Where a rafter is fastened to an adjacent parallel ceiling joist in accordance with this schedule, provide two toe nails on one side of the rafter and toe nails from the ceiling joist
    to top plate in accordance with this schedule. The toe nail on the opposite side of the rafter shall not be required.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s; 1 ksi = 6.895 MPa.
    a. Nails are smooth-common, box or deformed shanks except where otherwise stated. Nails used for framing and sheathing connections are carbon steel and shall have mini-
    mum average bending yield strengths as shown: 80 ksi for shank diameter of 0.192 inch (20d common nail), 90 ksi for shank diameters larger than 0.142 inch but not larger than
    0.177 inch, and 100 ksi for shank diameters of 0.142 inch or less. Connections using nails and staples of other materials, such as stainless steel, shall be designed by accepted
    engineering practice or approved under Section R104.2.2.
    b. RSRS-01 is a Roof Sheathing Ring Shank nail meeting the specifications in ASTM F1667.
    c. Nails shall be spaced at not more than 6 inches on center at all supports where spans are 48 inches or greater.
    d. Four-foot by 8-foot or 4-foot by 9-foot panels shall be applied vertically.
    e. Spacing of fasteners not included in this table shall be based on Table R602.3(2).
    f. For wood structural panel roof sheathing attached to gable end roof framing and to intermediate supports within 48 inches of roof edges and ridges, nails shall be spaced at 4
    inches on center where the ultimate design wind speed is greater than 130 mph in Exposure B or greater than 110 mph in Exposure C. Fastener spacing applies where roof
    framing specific gravity is 0.42 or larger.

  • CWUIC § 3.6.3 Medium relevance — show source text

    3.6.3(8)—AUTOMATIC SPRINKLER PROTECTION REQUIREMENTS FOR**
    CLASS I LIQUID STORAGE IN METAL CONTAINERS OF 1-GALLON CAPACITY OR LESS WITH UNCARTONED
    OR CASE-CUT SHELF DISPLAY UP TO 6.5 FEET, AND PALLETIZED STORAGE ABOVE IN A DOUBLE-ROW RACK ARRAYa|IN-RACK SPRINKLER ARRANGEMENT AND DEMAND|Racks
    9 to 12 feet|Racks
    9 to 12 feet|Not
    Applicable|Not
    Applicable| |TABLE 5704.3.6.3(8)—AUTOMATIC SPRINKLER PROTECTION REQUIREMENTS FOR
    CLASS I LIQUID STORAGE IN METAL CONTAINERS OF 1-GALLON CAPACITY OR LESS WITH UNCARTONED
    OR CASE-CUT SHELF DISPLAY UP TO 6.5 FEET, AND PALLETIZED STORAGE ABOVE IN A DOUBLE-ROW RACK ARRAYa|IN-RACK SPRINKLER ARRANGEMENT AND DEMAND|Racks up to
    9 feet deep|Racks up to
    9 feet deep|1.
    Ordinary
    temperature,
    quick-response
    sprinklers,
    maximum 8 feet
    3 inches
    horizontal
    spacing
    2.
    One line of
    sprinklers at the
    6-foot level and
    the 11.5-foot
    level of storage
    3.
    Locate in
    longitudinal flue
    space,
    staggered
    vertical
    4.
    Shields required
    where multiple-
    level|1.
    Ordinary
    temperature,
    quick-response
    sprinklers,
    maximum 8 feet
    3 inches
    horizontal
    spacing
    2.
    One line of
    sprinklers at the
    6-foot level and
    the 11.5-foot
    level of storage
    3.
    Locate in
    longitudinal flue
    space,
    staggered
    vertical
    4.
    Shields required
    where multiple-
    level| |TABLE 5704.3.6.3(8)—AUTOMATIC SPRINKLER PROTECTION REQUIREMENTS FOR
    CLASS I LIQUID STORAGE IN METAL CONTAINERS OF 1-GALLON CAPACITY OR LESS WITH UNCARTONED
    OR CASE-CUT SHELF DISPLAY UP TO 6.5 FEET, AND PALLETIZED STORAGE ABOVE IN A DOUBLE-ROW RACK ARRAYa|CEILING SPRINKLER DESIGN AND DEMAND|Maximum
    spacing|Maximum
    spacing|100 ft2/head|100 ft2/head| |TABLE 5704.3.6.3(8)—AUTOMATIC SPRINKLER PROTECTION REQUIREMENTS FOR
    CLASS I LIQUID STORAGE IN METAL CONTAINERS OF 1-GALLON CAPACITY OR LESS WITH UNCARTONED
    **OR CASE-CUT SHELF DISPLAY UP TO 6.5 FEET,

  • CWUIC § 3.2.2 Medium relevance — show source text

    3.2.2|Minimum clearance
    to be maintained|N|||||||4293
    4296|| |A102.3.2.3|Electrical power line
    emergencies|N||||||||| |A102.4|Correction of
    condition|N||||||||| |A103|Access restrictions|N||||||||| |A103.1|Restricted entry to
    public lands|N||||||||| |A103.2|Trespassing on
    posted private
    property|N||||||||| |A103.2.1|Signs|N||||||||| |A103.2.2|Trespassing|N||||||||| |A103.3|Use of fire roads and
    defensible space|N||||||||| |A103.3.1|Obstructions|N||||||||| |A103.4|Use of motorcycles,
    motor scooters, ultra-
    light aircraft and
    motor vehicles|N||||||||| |A103.5|Tampering with
    locks, barricades,
    signs and address
    markers|N|||||||||

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    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
    Appendix A General requirements General requirements General requirements General requirements General requirements General requirements General requirements General requirements General requirements General requirements
    A103.5.1 Gates, doors, barriers
    and locks    		 N
    A104 Ignition source
    control    		 N
    A104.1 General N
    A104.2 Objective N
    A104.3 Clearance from igni-
    tion sources    		 N
    A104.4 Smoking N
    A104.5 Equipment and
    devices generating
    heat, sparks or open
    flames    		 N
    A104.6 Fireworks N
    A104.6.1 Authority to seize N
    A104.7 Outdoor fires N
    A104.7.1 General N
    A104.7.2 Permits N
    A104.7.3 Restrictions N
    A104.8 Incinerators, outdoor
    fireplaces, perma-
    nent barbecues and
    grills    		 N
    A104.8.1 Maintenance N
    A104.
  • CWUIC § 1270.06 Medium relevance — show source text

    (b) Requests for an Exception shall be made in writing to the Local Jurisdiction listed in 14 CCR § 1270.06 by the applicant or the applicant's authorized representative.

    At a minimum, the request shall state the specific section(s) for which an Exception is requested; material facts supporting the contention of the applicant; the details of the Exception proposed; and a map showing the proposed location and siting of the Exception. Local Jurisdictions listed in § 1270.06 (Inspections) may establish additional procedures or requirements for Exception requests. (c) Where an Exception is not granted by the inspection entity, the applicant may appeal such denial to the Local Jurisdiction. The Local Jurisdiction may establish or utilize an appeal process consistent with existing local building or planning department appeal processes. (d) Before the Local Jurisdiction makes a determination on an appeal, the inspector shall be consulted and shall provide to that Local Jurisdiction documentation outlining the effects of the requested Exception on Wildfire protection. (e) If an appeal is granted, the Local Jurisdiction shall make findings that the decision meets the intent of providing Defensible Space consistent with these regulations. Such findings shall include a statement of reasons for the decision. A written copy of these findings shall be provided to the CAL FIRE Unit headquarters that administers SRA fire protection in that Local Jurisdiction.

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    ADMINISTRATION

    [California Code of Regulations, Title 14, Division 1.5, §1270.08] Distance Measurements.

    All specified or referenced distances are measured along the ground unless otherwise stated.

    1.12.2 Agency identification. The provisions of this code applicable to wildland-urban interface areas identified in Section 1.12 are identified in the body of the code by square brackets containing references to applicable Title 14 sections and in the Cross Reference Table located in Appendix H, Section H107.

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    DIVISION II

    SCOPE AND ADMINISTRATION

    User notes:

    About this chapter: Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. Chapter 1 is in two parts: Part 1–General Provisions (Sections 101–102) and Part 2—Administration and Enforcement (Sections 103–113). Section 101 identifies which buildings and structures come under its purview and references other California Codes as applicable.

    This code is intended to be adopted as a legally enforceable document and it cannot be effective without adequate provisions for its administration and enforcement. The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner.

    Note: Sections adopted or amended by state agencies are specifically indicated by an agency banner or indicated in the Matrix Adoption Table.

    PART 1—GENERAL PROVISIONS

    SECTION 101—SCOPE AND GENERAL REQUIREMENTS

  • CWUIC § 1.5 Medium relevance — show source text

    The following matrix identifies each section in the California Wildland-Urban Interface Code and identifies the source document and section for the provisions. Some sections in this code are derived from more than one source and the language has been editorially massaged to coalesce and correlate with the other provisions in this code.

    2025 CWUIC 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 I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration Division I—California Administration
    1.1 General Y
    1.1.1 Title Y 1.1.1 1.1.1
    1.1.2 Purpose Y 1.1.2
    701A.2    		 1.1.2
    4901.2
    1.1.3 Scope Y 1.1.3 1.1.3
    1.1.4 Appendices Y 1.1.4 1.1.4
    1.1.5 Referenced codes Y 1.1.5 1.1.5
    1.1.6 Nonbuilding stan-
    dards, orders and
    regulations    		 Y 1.1.6 1.1.6
    1.1.7 Order of precedence
    and use    		 Y 1.1.7 1.1.7
    1.1.7.1 Differences Y 1.1.7.1 1.1.7.1
    1.1.7.2 Specific provisions Y 1.1.7.2 1.1.7.2
    1.1.7.3 Conflicts Y 1.1.7.3 1.1.7.3
    1.1.7.3.1 CBC and CRC Y 1.1.7.3.1 1.1.7.3.1
    1.1.8 City, county, or city
    and county amend-
    ments, additions or
    deletions    		 Y 1.1.8 1.1.8
    1.1.8.1 Findings and filings Y 1.1.8.1 1.1.8.1
    _1.1.8.
  • CWUIC § 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

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    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

  • CWUIC § 5.1 Medium relevance — show source text

    5.1|Gates, doors, barriers
    and locks|N||||||||| |A104|Ignition source
    control|N||||||||| |A104.1|General|N||||||||| |A104.2|Objective|N||||||||| |A104.3|Clearance from igni-
    tion sources|N||||||||| |A104.4|Smoking|N||||||||| |A104.5|Equipment and
    devices generating
    heat, sparks or open
    flames|N||||||||| |A104.6|Fireworks|N||||||||| |A104.6.1|Authority to seize|N||||||||| |A104.7|Outdoor fires|N||||||||| |A104.7.1|General|N||||||||| |A104.7.2|Permits|N||||||||| |A104.7.3|Restrictions|N||||||||| |A104.8|Incinerators, outdoor
    fireplaces, perma-
    nent barbecues and
    grills|N||||||||| |A104.8.1|Maintenance|N||||||||| |A104.9|Reckless behavior|N||||||||| |A104.10|Planting vegetation
    under or adjacent to
    energized electrical
    lines|N||||||||| |A105|Control of storage|N||||||||| |A105.1|General|N||||||||| |A105.2|Hazardous materials|N||||||||| |A105.3|Explosives|N||||||||| |A105.4|Combustible
    materials|N||||||||| |A105.4.1|Individual piles|N||||||||| |A105.4.2|Separation|N||||||||| |A106|Dumping|N||||||||| |A106.1|Waste material|N||||||||| |A106.2|Ashes and coals|N||||||||| |A107|Protection of pumps
    and water storage
    facilities|N||||||||| |A107.1|General|N||||||||| |A107.2|Objective|N||||||||| |A107.3|Fuel modification
    area|N||||||||| |A107.4|Trees|N||||||||| |A107.5|Protection of electri-
    cal power supplies|N||||||||| |A108|Land use limitations|N||||||||| |A108.1|General|N||||||||| |A108.2|Objective|N||||||||| |A108.3|Permits|N||||||||| |A108.4|Access roadways|N||||||||| |A109|Referenced standards|N||||||||| |A109.1|General|N|||||||||

    APPENDIX H-34 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

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    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,

  • CWUIC § 17958.8 Medium relevance — show source text

    or his or her authorized representative._ (B) The chief building official of the city, county, or city and county, or his or her authorized representative. (2) Any fee charged pursuant to the enforcement authority of this subdivision shall not exceed the estimated reasonable cost of providing the service for which the fee is charged, pursuant to Section 66014 of the Government Code.

    17958. Except as provided in Sections 17958.8 and 17958.9, any city or county may make changes in the provisions adopted pursuant to Section 17922 and published in the California Building Standards Code or the other regulations thereafter adopted pursuant to Section 17922 to amend, add, or repeal ordinances or regulations which impose the same requirements as are contained in the provisions adopted pursuant to Section 17922 and published in the California Building Standards Code or the other regulations adopted pursuant to Section 17922 or make changes or modifications in those requirements upon express findings pursuant to Sections 17958.5 and 17958.7. If any city or county does not amend, add, or repeal ordinances or regulations to impose those requirements or make changes or modifications in those requirements upon express findings, the provisions published in the California Building Standards Code or the other regulations promulgated pursuant to Section 17922 shall be applicable to it and shall become effective 180 days after publication by the California Building Standards Commission. Amendments, additions, and deletions to the California Building Standards Code adopted by a city or county pursuant to Section 17958.7, together with all applicable portions of the California Building Standards Code, shall become effective 180 days after publication of the California Building Standards Code by the California Building Standards Commission.

    18941.5.

    (a) (1) Amendments, additions, and deletions to the California Building Standards Code, including, but not limited to, green building standards, adopted by a city, county, or city and county pursuant to Section 18941.5 or pursuant to Section 17958.7, together with all applicable portions of the California Building Standards Code, shall become effective 180 days

    APPENDIX H-18 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

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    APPENDIX H—REFERENCED CALIFORNIA DOCUMENTS

    after publication of the California Building Standards Code by the commission, or at a later date after publication estab- lished by the commission. (2) The publication date established by the commission shall be no earlier than the date the California Building Standards Code is available for purchase by the public. (b) Neither the State Building Standards Law contained in this part, nor the application of building standards contained in this section, shall limit the authority of a city, county, or city and county to establish more restrictive building standards, including, but not limited to, green building standards, reasonably necessary because of local climatic, geological, or topographical conditions. The governing body shall make the finding required by Section 17958.7 and the other requirements imposed by Section 17958.7 shall apply to that finding. Nothing in this section shall limit the authority of fire protection districts pursuant to subdivision (a) of Section 13869.7. Further, nothing in this section shall require findings required by Section 17958.7 beyond those currently required for more restrictive building standards related to housing.

    SECTION H107—CROSS REFERENCE TOOL

Frequently asked questions

How do I confirm whether an appendix item is enforceable in my jurisdiction?

Check whether your jurisdiction formally adopted the CWUIC appendices. The CWUIC itself states that appendix provisions apply only if specifically adopted (see § 101.2.1).

If H107 lists multiple source sections, which one controls?

All cited source sections can contain relevant, complementary, or overlapping text. You must read each cited source section. § H107 notes that some CWUIC sections are derived from more than one source.

Can I rely on the H107 table wording for exact compliance language?

No. § H107 is a pointer to the original source documents. For exact enforceable wording, definitions, exceptions, and penalties, go to the cited source section (e.g., CBC, CFC, HSC).

Where do I find the H107 matrix in the published CWUIC?

Appendix H of the CWUIC contains the cross-reference matrix; look for SECTION H107 — CROSS REFERENCE TOOL in Appendix H.

What if the source document has been amended since the CWUIC was prepared?

H107 points you to the source as cited. You must verify the current, operative text of that source (including later amendments). The matrix does not substitute for checking the current code/statute.

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How do I read the Matrix Adoption Tables (Appendix H) to see which agencies adopted which provisions?

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CWUIC cross-reference matrix & how to use it

California Wildland-Urban Interface Code