Cal. Health and Safety Code § 41600

(a) The districts shall provide for, and shall periodically revise as appropriate, the growth allowances necessary to accommodate the net air quality impact, if any, of cogeneration technology projects and resource recovery projects permitted pursuant to Section 42314, so that state and federal ambient air quality standards may be achieved and maintained or that reasonable further progress be made toward attainment. (b) If appropriate, the districts shall submit to the state board, for inclusion in the next state implementation plan revisions, the necessary control measures for the growth allowances for federally approved nonattainment pollutants and precursors required by subdivision (a). (c) Any district that lacks a federally approved demonstration of attainment with the national ambient air quality standard for ozone or nitrogen dioxide is not required to provide a growth allowance for any pollutant under this section until two years after the district makes both demonstrations. Federal approval shall be determined, based on regulations adopted by the Environmental Protection Agency, after public notice and opportunity for comment. After a district demonstrates attainment, the district may establish a growth allowance by allocating an air quality increment within the ambient air quality standard or through adoption of further control measures.