California Code, Government Code - GOV § 9359.10

The retirement allowance for a legislative statutory officer is an annual amount equal to 3 percent of the compensation payable to the officer at the time the officer vacates that legislative statutory office, or payable to the incumbent of that legislative statutory office at the time payments of the allowance fall due, whichever is higher, multiplied by the number of years of service with which the legislative statutory officer is entitled to be credited at the time of the officer's retirement.  In no event shall the allowance payable under this section exceed two-thirds of the compensation payable to the legislative statutory officer at the time the officer vacates that legislative statutory office, or two-thirds of the compensation payable to the incumbent of that legislative statutory office at the time payments of the allowance fall due, whichever is the higher;  provided, however, the allowance shall be further adjusted to reflect cost-of-living increases occurring after the retirement of the legislative statutory officer as determined under Section 9360.10 without respect to the limitations set forth in this section.

If a legislative statutory officer is entitled to a retirement allowance under any other state administered public retirement system, and the officer's total retirement allowances under both systems exceed the maximum allowance to which the officer would be entitled under this section with 20 years service in that legislative statutory office, the allowance payable under this section shall be reduced to the amount that it, combined with the retirement allowance to which the officer is entitled under the other system, does not exceed the maximum allowance to which the officer would be entitled under this section with 22 1/3 years service in that legislative statutory office.

The retirement allowance for a person who first commences service in any of the offices listed in Section 9350.55 or who becomes a member of this system on or after January 1, 1982, shall be based on compensation payable to that officer at retirement.  In no event shall the allowance be based on a compensation greater than the compensation the member received for such service.