(

a) The proceeds of an auxiliary Supplemental Benefit Maintenance Account shall be distributed annually in quarterly supplemental payments, commencing when funds in the Supplemental Benefit Maintenance Account are insufficient to support percent, 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 percent of the purchasing power of the initial monthly allowance after the application of all allowance increases authorized by this part, including those specified in Sections and 24415, and excluding those provided pursuant to Sections 24410.5, 24410.6, 24410.7, and 24410.8. (

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 and 22141, and the annual supplemental payment as specified in Sections and 24415, 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 the benefit effective date and June of the fiscal year preceding the fiscal year of distribution. (

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, nor part of the base allowance, and will be payable only to the extent that funds are available from the Supplemental Benefit Maintenance Account and the auxiliary Supplemental Benefit Maintenance Account. The board shall inform each recipient of the contents of this subdivision. (

e) The distributions authorized by this

section are vested only up to the amount payable as a result of the annual appropriation made pursuant to

Section and the adjustments made by the board pursuant to

Section 24415.5. The distributions authorized by this

section shall not be included in the base allowance for purposes of calculating the annual improvement factor defined by Sections and 22141. (

f) 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 percent of the change in the All Urban California Consumer Price Index between January and June of the fiscal year preceding the fiscal year of distribution, after the application of increases authorized by

Section 24412. (

g) 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 percent of the change in the All Urban California Consumer Price Index between January and June of the fiscal year preceding the fiscal year of distribution, after the application of increases authorized by

Section 24412. (

h) For purposes of restoring the purchasing power of benefits provided pursuant to

Section 24410.8 for members and beneficiaries receiving benefits pursuant to subdivision (b), the purchasing power calculation shall be based on percent of the change in the All Urban California Consumer Price Index between June and June of the fiscal year preceding the fiscal year of distribution, after the application of increases authorized by

Section 24412.