California Code, Government Code - GOV § 21023.5

(a) “Public service” for purposes of this article also means time served, not to exceed three years, as a volunteer in the Peace Corps, AmeriCorps VISTA (Volunteers In Service To America), or AmeriCorps.

(b) This section shall not apply to any contracting agency nor to the employees of any contracting agency until the agency elects to be subject to this section by contract or by amendment to its contract made in the manner prescribed for approval of contracts.

(c) Any member electing to receive credit for service under this section shall make the contributions as specified in Sections 21050 and 21052.  This section applies to past and future service in the Peace Corps, AmeriCorps VISTA (Volunteers In Service To America), or AmeriCorps.