Cal. Gov. Code § 75030.10

Any person who filed a declaration of candidacy for a judicial office pursuant to Section 8023 or 8201 of the Elections Code prior to May 1, 1962, and was elected to that office at the subsequent election, may elect pursuant to the provisions of Section 75030.5 to make contribution for, and receive credit in this system as service, time served as a public legal officer as defined in Section 75030.5. The contributions authorized by this section shall be made at the rate provided in Section 75102 on the effective date of this section.