California Code, Health and Safety Code - HSC § 18959

(a) Except as otherwise provided in Part 2.5 (commencing with Section 18901), all state agencies shall administer and enforce this part with respect to qualified historical buildings or structures under their respective jurisdiction.

(b) Except as otherwise provided in Part 2.5 (commencing with Section 18901), all local authorities shall, within their legal authority, administer and enforce this part with respect to qualified historical buildings or structures under their respective jurisdictions where applicable.

(c) The State Historical Building Safety Board shall coordinate and consult with the other applicable state agencies affected by this part and, except as provided in Section 18943, disseminate provisions adopted pursuant to this part to all local building authorities and state agencies at cost.

(d) Regulations adopted by the State Fire Marshal pursuant to this part shall be enforced in the same manner as regulations are enforced under Sections 13145, 13146, and 13146.5.

(e) Regular and alternative building standards published in the California Building Standards Code shall be enforced in the same manner by the same governmental entities as provided by law.

(f) When administering and enforcing this part, each local agency may make changes or modifications in the requirements contained in the California Historical Building Code, as described in Section 18944.7, as it determines are reasonably necessary because of local climatic, geological, seismic, and topographical conditions. The local agency shall make an express finding that the modifications or changes are needed, and the finding shall be available as a public record. A copy of the finding and change or modification shall be filed with the State Historical Building Safety Board. No modification or change shall become effective or operative for any purpose until the finding and modification or change has been filed with the board.