La. Stat. tit. 11 § 2214.1
A member of this system who is elected, who is eligible for retirement from this system, and who is eligible, for the same employment, for membership in another statewide retirement system may terminate his membership in this system upon his enrollment in the other system. If such member enrolls in another system, he shall file a notice of such enrollment in writing with the board of this system, and all employer and employee contributions to this system by or on behalf of the member shall cease upon receipt by the board of the notice. The former member may apply for retirement from this system and receive this retirement benefit any time after the termination of his membership in this system regardless of whether he terminates the employment that made him eligible for membership.
La. R.S. § 11:2214.1