California Code, Government Code - GOV § 21294

(a) The nonmember shall have the right to purchase service credit pursuant to the determination of the court required by Section 21290.

(b) The nonmember may purchase only that service credit that the court, pursuant to Section 21290 has determined to be the community property interest of the nonmember spouse.

(c) If the nonmember elects to purchase service credit, he or she shall pay, prior to retirement, the contributions and interest required by Article 4 (commencing with Section 20990) and Article 5 (commencing with Section 21020) of Chapter 11 and pursuant to the regulations of the board.

(d) The nonmember shall have no right to purchase the service credit after the effective date of a refund of the accumulated contributions in the separate account of the nonmember.

(e) The member has no right to purchase the community property interest of the nonmember of the service credit unless the nonmember has permanently waived all rights in the system by effecting a refund of accumulated contributions pursuant to Section 21292.  However, any service credit eligible for purchase that is not explicitly awarded to the nonmember by the judgment or court order shall be deemed the exclusive property of the member.

(f) If the nonmember elected to purchase service credits upon retirement and has subsequently died, prior to completing the purchase, the board shall file a claim against the estate of the deceased to recover benefit payments that exceeded those for which payment was made.