Cal. Health & Safety Code § 39656

It is the intent of the Legislature that the state board and the districts implement a program to regulate toxic air contaminants that will enable the state to receive approval to implement and enforce emission standards and other requirements for air pollutants subject to Section 112 of the federal act (42 U.S.C. Sec. 7412). The state board and the districts may establish a program that is consistent with the requirements for state programs set forth in subsection (