California Code, Government Code - GOV § 31653

(a) Any such member who exercises or did exercise the right to contribute to the system during the period of military service shall have those contributions refunded or credited to that member's account.

(b) Any such member who withdraws or has withdrawn accumulated contributions during military service and who does not or did not redeposit the amount withdrawn upon return to employment with the county or district is entitled to be credited with any contribution the governing board elects to make, and to receive credit for service during the period of absence for military service, the same as if the member had not withdrawn accumulated contributions, and the rate for future contributions shall be based upon the member's age at the commencement of the absence for military service.

(c) The contributions made by the governing board pursuant to this section shall be available only for the purpose of retirement for service or for disability, and shall be made available only for the purpose of retirement, and a member resigning from the service of the county or district after reinstatement from military service shall be entitled to withdraw only that portion of accumulated contributions personally made by the member.

(d) This section shall be retroactively applied to extend its benefits to such members of this system as the governing board may determine whose absence from county service on military service commenced on or after September 16, 1940, and who return or have returned to this service upon the termination of their military service.

(e) This section does not apply to a member who is subject to the California Public Employees' Pension Reform Act of 2013 (Article 4 (commencing withSection 7522) of Chapter 21 of Division 7 of Title 1).