California Code, Public Resources Code - PRC § 4554

Except for emergency regulations or orders of repeal adopted pursuant to Article 5 (commencing with Section 11346) of Chapter 3.5 of Part 1 of Division 3 of Title 2 of the Government Code, the board shall not adopt or revise rules, regulations, or resource conservation standards unless a public hearing is first held respecting their adoption or revision. At least 30 days prior to the hearing, the board shall give notice of the hearing by publication pursuant to Section 6061 of the Government Code.