California Code, Government Code - GOV § 20905

(a) Notwithstanding any other provision of this part, a school member employed on a part-time basis on and after January 1, 1991, shall, for that period of part-time employment, receive the credit he or she would receive if he or she was employed on a full-time basis and shall have his or her retirement allowance, as well as any other benefits he or she is entitled to under this part, based upon the salary that he or she would have received if employed on a full-time basis if he or she and his or her employer both contribute to the retirement fund the amount that would have been contributed if the member was employed on a full-time basis. Prior to the reduction of a classified employee's workload under this section, the school employer personnel responsible for the administration of this program shall verify the eligibility of the applicant for the reduced workload program. This section shall be applicable only to school members who are classified employees of school employers or community college districts and who have met the criteria provided in Sections 45139 and 88038 of the Education Code.

(b) The employer shall maintain the necessary records to separately identify each classified employee receiving credit pursuant to this section.

(c) For the purposes of this section, all contributions, liabilities, actuarial interest rates, and other valuation factors shall be determined on the basis of actuarial assumptions and methods which, in combination, offer the actuary's best estimate of anticipated experience under this system.