(c) The governing body of the Alabama Council for School Administration and Supervision may provide in its resolution to the Teachers' Retirement System's Board of Control that all service rendered, by an eligible employee or executive officer, to said council, previous to the effective date of said council's election to come under the Teachers' Retirement System, shall be creditable service to such employee or executive officer; provided, that any such provision shall apply only to those employees and officers who were in the active service of the council on the effective date of said council's election to be covered under the Teachers' Retirement System; and provided further, that the said resolution also states that the Alabama Council for School Administration and Supervision shall assume and pay, as required, all costs necessary to fund the crediting of such previous service, such costs to be determined by the actuary employed by the Teachers' Retirement System's Board of Control. All benefits that accrue and are payable to any beneficiary hereunder shall be limited to and shall not exceed the amount paid in by the beneficiary and the employer plus his portion of the interest earned and the enhancement of his moneys by investing them, less the cost of administration, at no cost to the State of Alabama.