Sec. 5.03. PROBATIONARY SERVICE CREDIT. (a) An eligible member or eligible surviving spouse may establish creditable service for probationary service performed as provided under this section according to the following conditions, limitations, and restrictions:

(1) Probationary service creditable in the system is any probationary service following commission date for which the member does not have creditable service.

(2) An eligible member or eligible surviving spouse may establish creditable service under this section by contributing to the system a single payment equal to the contribution the member would have made to the system for that service at the time the service was performed and an interest charge based on the contribution amount to be repaid times an interest factor. The interest factor is eight percent per year for the period that begins with the beginning of the month and year at the end of the probationary period for which creditable service is being established to the beginning of the month and year payment is made to the system for the purpose of establishing said service.

(3) After the eligible member or eligible surviving spouse makes the deposit required by Subdivision (2) of this subsection, the system shall grant the member one month of creditable service for each month of probationary service established under this section.

(b) For purposes of this section, an eligible member is a police officer employed by the city who is not separated from active service.

(c) For purposes of this section, an eligible surviving spouse is the surviving spouse of a member who was an eligible member immediately before the time of death if the member dies before making payment to the system of the amount required by this section. An eligible surviving spouse may establish creditable service for probationary service not later than the date that is six months after the date of the member's death and only if the lump-sum death benefit described by Section 6.05(a) or 6.06(a)(3) of this Act is not paid.

(d) The method of determining the amount of the required payment described by Subsection (a)(2) of this section may be changed if:

(1) the effect of the change is disclosed by the board's actuary;

(2) the change is adopted by the board as a board rule; and

(3) the change applies to all payments for establishing creditable service under this section made to the system after the effective date of the change.