California Code, Government Code - GOV § 22960

(a) The State Peace Officers' and Firefighters' Defined Contribution Plan is hereby established for state peace officer and firefighter members in Bargaining Unit 6 who have become subject to this part by memorandum of understanding, as provided by Section 3517.5.

(b) The plan may also be provided to state peace officers or firefighters who are either excluded from the definition of state employee in subdivision (c) of Section 3513, or are nonelected officers or employees of the executive branch of government and are not members of the civil service, and who supervise employees in a bargaining unit that is subject to this part, provided that the Department of Human Resources has approved their inclusion for coverage under this part.