Sec. 21. DETERMINATION OF BENEFITS; PROVISION OF INFORMATION. (a) The board may require any member, survivor, or other person or entity to furnish information the board requires for the determination of benefits under this article. If a person or entity does not cooperate in the furnishing or obtaining of information required as provided by this section, the board may withhold payment of the pension or other benefits dependent on the information.

(b) The city, not later than the 14th day after the date the city receives a request by or on behalf of the board, shall, unless otherwise prohibited by law, supply the pension system with personnel, payroll, and financial records in the city's possession that the pension system determines necessary to provide pension administrative and fiduciary services under this section, to establish beneficiaries' eligibility for any benefit, or to determine a member's credited service or the amount of any benefits, including disability benefits, and such other information the pension system may need, including:

(1) information needed to verify service, including the following information:

(A) the date a person is sworn in to a position;

(B) the days a person is under suspension;

(C) the days a person is absent without pay, including the days a person is on maternity leave;

(D) the date of a person's termination from employment; and

(E) the date of a person's reemployment with the city;

(2) medical records;

(3) workers' compensation records and pay information;

(4) payroll information;

(5) information needed to verify whether a member is on military leave; and

(6) information regarding phase-down participants, including information related to entry date and phase-down plan.

(c) The city shall provide any information that may be reasonably necessary to enable the pension system to comply with administrative services the pension system performs for the city as reasonably necessary to obtain any ruling or determination letter from the Internal Revenue Service.

(d) The information provided by the city shall be transmitted to the pension system electronically in a format specified by the pension system, to the extent available to the city, or in writing if so requested on behalf of the pension system.

(e) The pension system shall determine each member's credited service and pension benefits on the basis of the personnel and financial records of the city and the records of the pension system.