Cal. Health & Safety Code § 42301.12
(a) Any district permit system or permit provision established by a district board to meet the requirements of Title V shall, consistent with federal law, minimize the regulatory burden on Title V sources and the district and shall meet all of the following criteria:
(3) Identify in the permit, to the greatest extent feasible, permit terms and conditions which are federally enforceable and those which are not federally enforceable. A district shall make that identification by either of the following means: