La. Consolidated Public Retirement § 11:2165.1
There is hereby created a second tier of benefits within this system for persons whose first employment making them eligible for membership in this system occurred on or after January 1, 2013. The provisions of this Part shall be known as "Tier 2" of the system. The provisions of this Chapter applicable to persons whose first employment making them eligible for system membership occurred before January 1, 2013, shall be known as "Tier 1". Any other provisions of this Chapter or any other laws to the contrary notwithstanding, the retirement of such persons shall be governed by the provisions of this Part; however, if provisions of this Chapter applicable to the original plan cover matters not specifically addressed by the provisions of this Part or if any of the provisions of this Chapter are made applicable in this Part, then those provisions shall apply to members governed by this Part.
La. Consolidated Public Retirement § 11:2165.1