California Code, Government Code - GOV § 21261

(a) An application for a refund of the member's accumulated contributions, an election of optional settlement, a designation of beneficiary, or a change in beneficiary designation shall contain the signature of the current spouse of the member, unless the member declares, in writing under penalty of perjury, any of the following:

(b) Notwithstanding subdivision (a), the designation of a member's current spouse as the member's sole primary beneficiary on any lump-sum beneficiary designation shall not require the signature of the member's current spouse.

(c) Notwithstanding subdivision (a), when a member makes an election of optional settlement that, upon the member's death, provides the member's current spouse with a monthly lifetime allowance that is the same as the monthly lifetime allowance received by the member, and the member's current spouse is also designated as the member's sole primary beneficiary on any lump-sum beneficiary designation, the election shall not require the signature of the member's current spouse.