California Code, Health and Safety Code - HSC § 41010

(a) The Sacramento district board shall adopt rules and regulations that are not in conflict with state and federal laws and rules and regulations that reflect the best available technological and administrative practices. Upon adoption and approval of the air quality improvement strategy, the rules and regulations shall be amended, if necessary, to conform to the strategy.

(b) The rules and regulations adopted pursuant to subdivision (a) shall require the use of best available control technology for new and modified sources and the use of best available retrofit control technology for existing sources.

(c) The rules and regulations of the Sacramento County Air Pollution Control District shall remain in effect and shall be enforced by the Sacramento district, until superseded or amended by the Sacramento district board.

(d) In adopting any regulation, the Sacramento district board shall comply with Section 40703.