La. Stat. tit. 32 § 444
Any other provision of law, particularly Part V of Chapter 1 of this Title, to the contrary notwithstanding, unless the presence of equipment on a motor vehicle was a prior condition to the sale, to the offering for sale or to the operation of a motor vehicle on the highways of this state at the time the motor vehicle was manufactured for sale or use, the absence of equipment now or hereafter required by law from motor vehicles of historic or special interest shall not be construed as prohibiting the sale, the offering for sale or the legal operation on the highways of this state of any motor vehicle of historic or special interest. Notwithstanding the provisions of Chapter 7 of this Title, any motor vehicle of historic or special interest manufactured prior to the date on which emission control devices were standard equipment on that particular make or model of motor vehicle shall be exempt from all state and local requirements relative to the inspection and use of such emission control devices. Any safety equipment that was manufactured as part of such vehicle's original equipment shall be maintained in proper operating condition whenever the vehicle is operated on the highways of this state.
La. R.S. § 32:444