La. Consolidated Public Retirement § 11:160
Any person who is a member of the Louisiana State Employees' Retirement System, who has creditable membership service of at least ten years in this system, and who becomes an employee of a political subdivision where he is no longer eligible, through transfer of his employing agency, for membership in this system, but is eligible for membership in some other public retirement system, shall have the right to remain a member of this system in lieu of membership in the other retirement system by filing a notice of election to remain in this system, in writing, with the board of trustees within thirty days after the effective date of employment, or September 7, 1990, whichever is later. Such election shall be irrevocable. The non-participating employer shall contribute to the Louisiana State Employees' Retirement System as if it were a participating employer.
La. Consolidated Public Retirement § 11:160