GOV §21356: (a) A member who elects, pursuant to Article 1.

(a) A member who elects, pursuant to Article 1.7 (commencing with Section 19996.30) of Chapter 7 of Part 2.6 or pursuant to Sections 21110 through 21115, to participate in partial service retirement, while so participating, shall receive a reduced service retirement allowance. The reduced service retirement allowance shall be the amount of the service retirement allowance to which the employee would otherwise have been entitled had he or she fully retired on the effective date of the partial service retirement, reduced by the percentage of the employee’s full-time work which the employee has elected to work while on partial service retirement. (b) Article 6 (commencing with Section 21450) and Article 7 (commencing with Section 21470) shall not apply to an employee who is participating in reduced worktime for partial service retirement. (c) For a member who elects pursuant to Article 1.7 (commencing with Section 19996.30) of Chapter 7 of Part 2.6 or pursuant to Sections 21110 through 21115 to become fully retired, the current service pension, or current and prior service pensions, as the case may be, upon his or her full service retirement shall be (1) the sum of a current service pension calculated on the basis of service rendered during participation in reduced worktime in accordance with the formula applicable to his or her current service pension, plus his or her current service pension, or current and prior service pensions, as the case may be, as it was prior to his or her full service retirement, provided that full service retirement occurs before he or she renders, while participating in reduced worktime for partial service retirement, one year of state service credited under this system; or (2) if he or she has rendered one year or more of state service while participating in reduced worktime for partial service retirement, a current service pension, or current and prior service pensions, as the case may be, based on the total years of service with which the member is entitled to be credited, calculated on the basis of the formula currently applicable to the employment in which the service was rendered. A member shall receive service credit for service during participation in reduced worktime for partial retirement and service credited at the time of the election to participate in reduced worktime for partial retirement.