However, if, on the date the application is received by the board, there is no longer in existence a record in the board’s possession setting forth the retirement data relating to the retired member, the applicant survivor or survivors of the retired member shall be required, as a condition precedent to his or her entitlement to the benefit provided by this section, to furnish documentary evidence satisfactory to the board to enable it to determine the date of the retired member’s death and the amount of the member’s allowance that was currently payable at the time of death. The net benefit payable to the retired member at the time of death shall be determined on the basis of the evidence submitted, unless the board is able to determine the unmodified allowance payable at the time of death. If the allowance payable to an eligible survivor is based on evidence furnished by the survivor or partial member records in the board’s possession, or both, the board shall use that information to assume any additional

factors required to calculate the allowance payable. The benefits shall be subject to the same eligibility and termination provisions that apply to members at retirement and shall, subject to subdivision (b), be paid only for the period of time commencing on the first of the month following receipt by the board of the application for the benefits. The board has no duty to locate or notify any potential survivor or to provide the name or address of any potential survivor to any person, agency, or entity for the purpose of notifying survivors.

of the Statutes of 1984, shall commence no sooner than January 1, 1985.