Cal. Health & Safety Code § 42506

In order to assist in interpreting district rules and regulations governing new source review for nonattainment areas and for prevention of significant deterioration, the state board shall provide on its Web site and in writing for purchase by the public, a copy of the federal new source review regulations as they existed on December 30, 2002, and the United States Environmental Protection Agency’s guidance document entitled, “New Source Review Workshop Manual: Prevention of Significant Deterioration and Nonattainment Area Permitting,” (October 1990 Draft).