La. Consolidated Public Retirement § 11:764
Notwithstanding any other provision of the law to the contrary, any member of the State Teachers' Retirement System who failed to exercise by September 30, 1962 the option granted under the provisions of R.S. 17:631, as amended by Act 186 of the 1962 regular session of the legislature, to a member for his retirement benefits to be based additionally on salaries in excess of seven thousand five hundred dollars per annum, may exercise said option on or before September 30, 1971, by giving written notice to the board of trustees of the intention so to do and by payment of the employee's contribution of six percent, with interest, on all prior salary earned in excess of seven thousand five hundred dollars per annum, if the failure to exercise the option by September 30, 1962 was by reason of lack of knowledge of said option and such lack of knowledge is evidenced by the fact that there is no record in the files of the system of a reply from the member to the option statement mailed by the system to all members. The employers of members who are entitled to and who exercise the option provided in this Section shall pay to the system on or before December 31, 1971, the employer's contribution on all prior salary in excess of seven thousand five hundred dollars per annum for the period.
La. Consolidated Public Retirement § 11:764