(a) The proceeds of the Supplemental Benefit Maintenance Account shall be distributed annually in quarterly supplemental payments commencing on September 1, 1990, to retired members, disabled members, and beneficiaries, as defined in subdivision (a) of Section 22107. The amount available for distribution in any fiscal year shall not exceed the amount necessary to restore purchasing power up to 85 percent of the purchasing power of the base allowance, after the application of all allowance increases authorized by this part, including those specified in Section 24412, and excluding those provided pursuant to Sections 24410.5, 24410.6, and 24410.7.

(b) The net revenues to be distributed shall be allocated among those retired members, disabled members, and beneficiaries, as defined in subdivision (a) of Section 22107, whose allowances, after sequentially applying the annual improvement factor as defined in Sections 22140 and 22141, and the annual supplemental payment as specified in Section 24412, have the lowest purchasing power percentage. The purchasing power calculation for each individual shall be based on the change in the All Urban California Consumer Price Index between June of the calendar year of retirement and June of the fiscal year preceding the fiscal year of distribution. In any year in which the purchasing power of the allowances of all retired members, disabled members, and beneficiaries, as defined in subdivision (a) of Section 22107, equals not less than 85 percent and additional funds remain from the allocation authorized by this section, those funds shall remain in the Supplemental Benefit Maintenance Account for allocation in future years.

(c) The allowance increase shall not be applicable to annuities payable from the accumulated annuity deposit contributions or the accumulated tax-sheltered annuity contributions.

(d) The increases provided by subdivision (b) are not cumulative, not part of the base allowance, and will be payable only to the extent that funds are available from the Supplemental Benefit Maintenance Account. The board shall inform each recipient of the contents of this subdivision.

(e) The adjustments authorized by this section are vested only up to the amount payable as a result of the annual appropriation made pursuant to Section 22954 and the adjustments made by the board pursuant to Section 24415.5. The adjustments authorized by this section shall not be included in the base allowance for purposes of calculating the annual improvement defined by Sections 22140 and 22141.

(f) Notwithstanding subdivision (b), for purposes of restoring the purchasing power of benefits provided pursuant to Section 24410.5 for members and beneficiaries receiving benefits pursuant to subdivision (b), the purchasing power calculation shall be based on 85 percent of the change in the All Urban California Consumer Price Index between January 2000 and June of the fiscal year preceding the fiscal year of distribution, after the application of increases authorized by Section 24412 that are made to the allowances provided pursuant to Section 24410.5.

(g) Notwithstanding subdivision (b), for purposes of restoring the purchasing power of benefits provided pursuant to Sections 24410.6 and 24410.7 for members and beneficiaries receiving benefits pursuant to subdivision (b), the purchasing power calculation shall be based on 85 percent of the change in the All Urban California Consumer Price Index between January 2001 and June of the fiscal year preceding the fiscal year of distribution, after the application of increases authorized by Section 24412 that are made to the allowances provided pursuant to Sections 24410.6 and 24410.7.

(Amended by Stats. 2014, Ch. 755, Sec. 68. (SB 1220) Effective January 1, 2015.)