California Code, Government Code - GOV § 21072

(a) A member who elects to be subject to Section 21076 shall be credited at no cost with all creditable previous state miscellaneous or state industrial service after the member is credited with one year of service under Section 21076. A member who was subject to Section 21076, who terminates membership, and who subsequently returns to state service shall be granted, at no cost, all of the service credit earned as a result of the election, after the member is credited with one year of service following return to state service. The one-year requirement shall be waived for a member who meets the service credit requirements for disability retirement specified in Section 21150 with the past creditable service.

(b) A member who elects to be subject to Section 21077, who terminates membership and who subsequently returns to service shall be credited, at no cost, with the service earned as a result of the election, after the member is credited with one year of service following return to state service. The one- year requirement shall be waived for a member who meets the service credit requirements for disability retirement specified in Section 21150 with the past creditable service.

(c) A member who is entitled to service credit under this section shall apply for and identify time periods for that service to the board.

(d) This section shall become inoperative on January 1, 2000.

(e) The amendments to this section enacted during the first year of the 1999-2000 Regular Session are subject to the limitations set forth in Section 21251.13.