(a) The governing body of the Alabama State Employees' Association, the Alabama Retired State Employees' Association and the State Employees' Credit Union may, by resolution legally adopted to conform to the rules prescribed by the Board of Control of the Teachers' Retirement System, elect to have its executive officers and full-time employees, from whatever source and in whatever manner paid, become eligible to participate in the Teachers' Retirement System of Alabama, subject to all rules, regulations and conditions thereof.

(b) The governing body of the Alabama State Employees' Association, the Alabama Retired State Employees' Association and the State Employees' Credit Union having made an election through a resolution as provided in subsection (a) hereof, their employees and executive officers may participate in and be entitled to all benefits of the Teachers' Retirement System of Alabama, provided that where contributions are made from salaries paid by the Alabama State Employees' Association, the Alabama Retired State Employees' Association and the State Employees' Credit Union the entities shall pay the employer costs as a percentage of the salaries of those employees, to be contributed as employer in accordance with Section 16-25-21. Such amounts shall be paid monthly and at the same time as the members' contributions are made to the Teachers' Retirement System.

(c) The governing body of the Alabama State Employees' Association, the Alabama Retired State Employees' Association or the State Employees' Credit Union may provide in its resolution to the Teachers' Retirement System Board of Control that all service rendered by an eligible employee or executive officer previous to the effective date of said group'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 group on the effective date of said group's election to be covered under the Teachers' Retirement System; and provided further, that the said resolution also states that the Alabama State Employees' Association, the Alabama Retired State Employees' Association and the State Employees' Credit Union 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 Board of Control.