Health & Saf. Code, § 17023

(a) Rules and regulations adopted or continued in effect pursuant to the provisions of this part relating to the erection or construction of buildings or structures within employee housing shall not apply to existing buildings or structures or to buildings and structures as to which construction is commenced or approved prior to the effective date of the rules and regulations, except by act of the Legislature, but regulations relating to use, maintenance, and occupancy shall apply to all employee housing approved for construction and operation before or after the effective date of these rules and regulations.

(b) Building standards, as defined in Section 18909, shall remain in effect only until January 1, 1985, or until adopted, amended, or superseded by provisions published in the State Building Standards Code pursuant to Chapter 4 (commencing with Section 18935) of Part 2.5, whichever occurs sooner.