Cal. Government Code § 31772

(a) A program account shall be established within the system for each participant. No system assets shall be separately segregated for any program account. A participant may not have a claim on any specific assets of the system. (b) A participant’s program account shall be credited with an amount equal to the service retirement allowance the member would have received if the member had retired for service on the election date and had selected an unmodified allowance, subject to the following: (1) Sick leave and vacation time accrued by the member as of the election date may not be included in the calculation of service credit or final compensation for the retirement time where the member enters the program, except as otherwise provided in a collective bargaining agreement. (2) The provisions of Article 15 (commencing with Section 31830) may not apply in the calculation of the participant’s final compensation. (c) Subject to the results of the actuarial analysis and the requirement that the program be cost neutral, the implementing ordinance may provide that some or all of the following amounts shall also be credited monthly to the participant’s program account: (1) Some or all of the normal member contributions under this chapter made by, or on behalf of, the participant during the program period. (2) Some or all of the employer contributions to the system made on account of the participant during the program period. (3) Some or all of the annual cost-of-living adjustments the member would have received if the member had retired for service on the election date and selected an unmodified allowance. (4) Interest. If the implementing ordinance provides for the crediting of interest, it shall be credited semiannually at a rate that is equal to: (A) the interest rate, if any, applicable to employee contributions to the system, or (B) a fixed rate specified in the implementing ordinance, or (C) a rate determined semiannually by the retirement board.