Sec. 19. PERSONS REJOINING OR TRANSFERRED BY CITY; SERVICE CREDIT; DOUBLE BENEFITS; RETURN TO SERVICE. (a) An employee of the city who has retired under this article or under former law governing the pension system and is or has been transferred by action of the city to a classified position in a police department included in the pension system again becomes an active member of the pension system as of the effective date of the transfer.

(b) A person who rejoins the pension system under this section is eligible to receive service credit for each day of service and work performed by the person in a classified position in the police department, except for any period during which the person is a DROP participant. The board shall add service earned after the transfer to the prior service the active member accrued in a classified position in the police department. However, the active member may not receive service credit under this article, except to the extent provided by Section 18, for service performed for the city other than in a classified position in the police department.

(c) After a transfer described by this section, contributions of the city and the active member become payable as for other active members of the pension system.

(d) When a member who has transferred as described by this section subsequently retires, the retired member is eligible for a pension computed on the basis of the combined service described by Subsection (b) of this section, after deducting any period in which the member was suspended from duty without pay, on leave of absence without pay, separated from service, or employed by the city in a capacity other than in a classified position in the police department.

(e) If a retired member receives both pension benefits from the pension system and a salary from a classified position in the police department that cover the same period, the retired member shall repay to the pension system the pension benefits received during that period. The board shall withhold payment of pension benefits under this article if it is determined that a retired member is receiving both pension benefits from the fund and a salary from the police department that cover the same period. On request of the board, the city attorney or a private attorney chosen by the board shall file suit in a court of competent jurisdiction to recover pension benefits owed to the pension system under this subsection.

(f) This article does not authorize the return to service with a police department or the resumption of active membership in the pension system by a retired member except as specifically provided by Section 13 or 14 of this article or this section.