Cal. Health & Safety Code § 25150.5

On or before July 1, 1995, the department shall revise any standard or regulation it has adopted that requires the preparation of a contingency plan, as that term is defined in Section 66260.10 of Title 22 of the California Code of Regulations, to allow the person preparing the contingency plan to use the format adopted pursuant to Section 25503.4, if that person elects to use that format.