California Code, Government Code - GOV § 9359.12

(a) Any contrary provisions of Section 9359.1 or Section 9360.9 notwithstanding, and subject to the further limitations in subdivision (b), the retirement allowance of any member of the Legislators' Retirement System who serves as a legislator during or after the term commencing in 1967 shall be the sum of:  (1) the amount determined by application of the formula provided by Section 9359.1 to the first five hundred dollars ($500) per month of salary payable to the legislator at the time of his or her retirement, plus (2) an amount equal to 3 percent of the amount of such salary in excess of five hundred dollars ($500) per month multiplied by the number of years credited the member, or two-thirds of the amount of such salary payable to the legislator at the time of his or her retirement, whichever is the lesser, plus, in the case of members credited with service prior to the term commencing in 1967, an amount equal to a cost-of-living increase computed under Section 9360.9 as of January 1, 1967, on that portion of the allowance based on five hundred dollars ($500) per month, and said total to be further adjusted to reflect cost-of-living increases occurring after the member's retirement as determined under Section 9360.10.

(b) Except as provided in subdivision (c), during such time as he or she serves in any salaried public office any retired member of the Legislators' Retirement System who served as a legislator during or after the term commencing in 1967 shall receive a retirement allowance computed by application of the formula set forth in Section 9359.1 to a salary of five hundred dollars ($500), and any increase in salary above such amount shall, for such purpose, be disregarded.

(c) If a retired member who is otherwise subject to subdivision (b) is, while serving as a member of a public board or commission, entitled to receive for that service per diem compensation and expenses or compensation and expenses, he or she may, notwithstanding any other provision of the law, waive the compensation.  If the compensation is waived, the member shall not be subject to subdivision (b).  Nothing in this section shall be construed as requiring the waiver of expenses or per diem compensation which is in lieu of expenses.