Cal. Health and Safety Code § 17960.5

The building standards for residential buildings in Chapter 2-53 of Part 2, and Chapter 4-10 of Part 4, of Title 24 of the California Administrative Code effective July 13, 1982, shall not apply to the construction of new residential housing projects which received approval by an advisory agency or other appropriate local agency on or before June 15, 1982, provided application for the permits to construct single-family detached dwellings are submitted or filed on or before June 15, 1983, and the application for all other residential building permits are submitted or filed on or before December 31, 1983. For the purposes of this section, “approval” includes, but is not limited to, approval or conditional approval of a tentative subdivision or tentative parcel map or parcel map pursuant to the Subdivision Map Act (Division 2 (commencing with Section 66410) of Title 7 of the Government Code), condominium plan or other permit for a residential housing project.