California Code, Health and Safety Code - HSC § 40445.5

(a) The south coast district board shall conduct hearings on the adoption and implementation of intermittent transportation controls which shall be applicable, upon order of the south coast district board, during periods in the months of June to October, inclusive, when an air pollution emergency, as defined in the Air Pollution Emergency Plan of the state board, has been called pursuant to the authority of the south coast district under Section 40444 to implement that plan.

(b) The south coast district board shall conduct the hearings pursuant to subdivision (a) to define and designate the necessary transportation controls in cooperation with representatives of industry, transportation, and local governments in the south coast district.

(c) The south coast district board shall incorporate its findings and determinations into the south coast district air quality management plan.