La. Public Officers and Employees § 42:457.1
Any employee of the state or of any political subdivision of the state may authorize his employer to withhold from his salary a specific amount for such pay periods as may be designated, for payment of his dues to any professional state or local law enforcement or firefighter association which is located or is operating a chapter within the respective jurisdiction and to which the employee belongs. The employee must voluntarily execute and furnish to the employer a written and specific authorization for such deduction. Upon receipt of such authorization, and in accordance with the instructions contained therein, the employer shall begin to make such deductions. The amounts withheld shall be remitted forthwith to the organization designated by the employee. The provisions of this Section shall not apply to any employee of the local sheriff's office or parish law enforcement district.
La. Public Officers and Employees § 42:457.1