California Code, Government Code - GOV § 21039

(a) Notwithstanding any other provision of law, a safety member, as defined in subdivision (b) of Section 20371, who has elected to receive credit for service by making contributions in installment payments and who retires or has retired due to industrial disability while making those payments, may elect to cancel the payments prospectively if the election to receive credit for service does not increase the member's allowance payable. The effective date of the member's election to cancel payments shall be the first day of the month following receipt of the election by the system. No refund of contributions paid in installments prior to the effective date of the member's election to cancel the payments shall be payable to a member or retired member as a result of an election made by a member pursuant to this section.

(b) A member's election pursuant to this section shall be void, and the installment payments shall resume, upon a member's reinstatement from retirement for industrial disability. The remaining balance due shall be recalculated to include interest during the industrial disability retirement period.

(c) Except as set forth in subdivision (d), nothing in this section shall be construed to limit any right or benefit granted pursuant to Section 20776 or 21037, as amended by Senate Bill 268  1 of the 2003-04 Regular Session.

(d) Notwithstanding any other provision of this section, any election with an effective date on or after January 1, 2020, shall be subject to subdivision (e) of Section 20776.