Section 23566 - Laborers, option to join fund; certain other employes, required to join; back payments(a) Should any person holding position in said cities of the second class as laborer, at a per diem wage, he or she shall not be compelled to pay or contribute toward the pension fund herein provided for, but shall have the option or choice of so doing at any time within six months after the date of their employment, and, in that event only, of becoming entitled to the pension provided by this act.(b) Every new full time employe except as provided in subsection (a) of this section shall after serving a ninety (90) day probation period be required to join the pension fund and shall thereafter make contributions to such fund as provided in section five of this act. Every temporary employe who was formerly a full time employe and a member of the pension fund, and who did not withdraw money he paid into such fund when he became separated from full time employment with the city, shall, upon becoming a temporary employe, be required to immediately rejoin the pension fund and shall thereafter, for the remainder of the temporary employment, make contributions to such fund as required by section five of this act. (c) Any city employe who holds a position as a school guard or meter maid shall, within thirty (30) days after the passage of this act, be required to join the pension fund and shall thereafter make contributions to such fund as provided in section five of this act. Every new employe holding a position of school guard or meter maid shall, after completing six (6) months of continuous employment, be required to join the pension fund and shall thereafter make contributions to such fund as provided in section five of this act.(d) Any city employe who holds a position as a school guard or meter maid, upon joining the pension fund, shall have the option of making back payments at the same rate as if she had been a member of the pension fund during the period of her employment as a school guard or meter maid, in a lump sum or by installments over a one (1) year period, in a manner to be determined by the pension board, and shall receive full credit towards her pension, provided she produces proof satisfactory to the pension board of the number of years of such service.1915, May 28, P.L. 596, § 6. Amended 1941, Aug. 1, P.L. 748, § 1; 1947, June 10, P.L. 524, § 3; 1970, Feb. 13, P.L. 17, No. 9, § 1; 1970, Nov. 25, P.L. 758, No. 248, § 1.