(

a) The board of supervisors in a county of the ninth class, as defined in Sections and 28030, may elect to provide an additional benefit to members who retired and to their surviving beneficiaries who are receiving allowances under this system, if the following conditions are satisfied:

(1) A qualified actuary determines the cost of the payments authorized by this section.

(2) The board of retirement fully funds the costs of the payments by this

section through a transfer of funds from the reserves as provided in

Section 31592.2. (

b) The payments shall be made monthly only to those members and their surviving beneficiaries who are receiving allowances under this system on a date established by the board of retirement. (

c) The first payment shall be effective on the first day of the first full month that occurs after adoption of this

section by the board of supervisors. (

d) The amount of each additional monthly benefit to a retired member shall be two hundred dollars ($200). (

e) Notwithstanding subdivision (d), the monthly payments to beneficiaries of members pursuant to

Section 31760.1, 31765.1, 31781.1, or 31785, or to beneficiaries who elect a combined benefit pursuant to

Section 31781.3 shall be one hundred twenty dollars ($120). (

f) Notwithstanding subdivision (d), the monthly payments to beneficiaries of members who elected optional settlement three pursuant to

Section shall be one hundred dollars ($100). (

g) The payments made pursuant to this

section shall be considered a part of the monthly allowance and shall be increased by any subsequent cost-of-living allowance under

Article 16.5 (commencing with

Section 31870).