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Earlier editions: 20222019

Chapter 1 — ADMINISTRATION

1.2 Building Standards Commission — 2025 California Existing Building Code

California Existing Building Code (Title 24, Part 10) · 2025 edition · updated 2026-09-25 · California

CBSC: official editions, supplements and errata

Italicized text is a California amendment to the model code, as printed in the official publication.

Cite as: 2025 California Existing Building Code (Title 24, Part 10) § 1.2 · Effective January 1, 2026 · Official source: Building Standards Commission

1.2.1 BSC. Specific scope of application of the agency responsible for enforcement, the enforcement agency and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated. 1. State buildings for all occupancies.

Application— State buildings (all occupancies), including buildings constructed by the Trustees of the California State University (CSU) and the Regents of the University of California (UC) where no state agency has the authority to adopt building standards applicable to such buildings.

Enforcing agency— State or local agency specified by the applicable provisions of law.

Authority cited— Health and Safety Code Section 18934.5.

Reference— Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901.

ADMINISTRATION

2. University of California, California State Universities and California Community Colleges.

Application— Standards for lighting for parking lots and primary campus walkways at the University of California, California State Universities and California Community Colleges.

Enforcing agency— State or local agency specified by the applicable provisions of law.

Authority cited— Government Code Section 14617.

Reference— Government Code Section 14617.

3. Existing state-owned buildings, including those owned by the University of California and by the California State University.

Application— Building seismic retrofit standards including abating falling hazards of structural and nonstructural components and strengthening of building structures. See also Division of the State Architect.

Enforcing agency— State or local agency specified by the applicable provisions of law.

Authority cited— Health and Safety Code Section 16600.

Reference— Health and Safety Code Sections 16600 through 16604. 4. Unreinforced masonry-bearing wall buildings.

Application— Minimum seismic strengthening standards for buildings specified in Appendix Chapter A1 of the California Existing Building Code, except for buildings subject to building standards pursuant to Health and Safety Code (commencing) with Section 17910.

Enforcing agency— State or local agency specified the applicable provisions of law.

Authority cited— Health and Safety Code Section 18934.7.

Reference— Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901.

1.2.1.1 State building. For purposes of this code, a “state building” is a structure for which a state agency or state entity has authority to construct, alter, enlarge, replace, repair or demolish.

1.2.1.2 Enforcement. [CSU, UC, Judicial Council and California Department of Corrections and Rehabilitation] State agencies or state entities authorized to construct state buildings may appoint a building official who is responsible to the agency for enforcement of the provisions of the California Building Standards Code.

Exception: State buildings regulated by other sections of this code remain the enforcement responsibility of the designated entities.

1.2.1.3 Enforcement. Reserved for DGS.

1.2.1.4 Adopting agency identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym BSC .

1.2.2 BSC-CG. Specific scope of application of the agency responsible for enforcement, the enforcement agency and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated. 1. Green building standards for nonresidential occupancies.

Application— All occupancies where no state agency has the authority to adopt green building standards applicable to those occupancies.

Enforcing agency— State or local agency specified by the applicable provisions of law.

Authority cited— Health and Safety Code Sections 18930.5(a), 18938 and 18940.5.

Reference— Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901. 2. Graywater systems for nonresidential occupancies.

Application— The construction, installation and alteration of graywater systems for indoor and outdoor uses in nonresidential occupancies.

Enforcing agency— State or local agency specified by the applicable provisions of law.

Authority cited— Health & Safety Code Section 18941.8.

Reference— Health & Safety Code Section 18941.8.

1.2.2.1 Adopting agency identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym BSC-CG .

1.2.3 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. An alternative material, design or method of construction shall be approved where the building official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety.

1.2.3.1 Research reports. Supporting data, where necessary to assist in the approval of materials or assemblies not specifically provided for in this code, shall consist of valid research reports from approved sources.

1-6 2025 CALIFORNIA EXISTING BUILDING CODE

ADMINISTRATION

1.2.3.2 Tests. Whenever there is insufficient evidence of compliance with the provisions of this code, or evidence that a material or method does not conform to the requirements of this code, or in order to substantiate claims for alternative materials or methods, the building official shall have the authority to require tests as evidence of compliance to be made at no expense to the jurisdiction. Test methods shall be as specified in this code or by other recognized test standards. In the absence of recognized and accepted test methods, the building official shall approve the testing procedures. Tests shall be performed by an approved agency. Reports of such tests shall be retained by the building official for the period required for retention of public records.

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