Cal. Lab. Code § 7856
By March 31, 2014, the board shall adopt process safety management standards for refineries, chemical plants, and other manufacturing facilities, as specified in Codes 28 (Chemical and Allied Products) and 29 (Petroleum Refining and Related Industries) of the Manual of Standard Industrial Classification Codes, published by the United States Office of Management and Budget, 1987 Edition, that handle regulated substances as defined in subdivision (i) of Section 25532 of the Health and Safety Code and pose a significant likelihood of accident risk, as determined by the board. Alternately, upon making a finding that there is a significant likelihood of risk to employees at a facility not included in Codes 28 and 29 resulting from the presence of acutely hazardous materials or explosives as identified in Part 172 (commencing with Section 172.1) of Title 49 of the Code of Federal Regulations, the board may require that these facilities be subject to the jurisdiction of the standards provided for in this section. When adopting these standards, the board shall give priority to facilities and areas of facilities where the potential is greatest for preventing severe or catastrophic accidents because of the size or nature of the process or business. The standards adopted pursuant to this section shall require that injury prevention programs of employers subject to this part and implemented pursuant to Section 6401.7 include the requirements of this part.
Ca. Lab. Code § 7856