If the Board of Trustees determines that a member or beneficiary has received from this System benefit payments that exceed the amount to which the member or beneficiary was entitled, the Board must take all necessary steps to recover the overpayment. City Code, 1927, art. 30, §12 1950, art. 23, §12 1966, art. 22, §12 1976/83, art. 22, §12 Ord. 26-553 Ord. 74-552 Ord. 75-1058 Ord. 16-488