La. Stat. tit. 45 § 190
Current with changes from the 2024 legislative session effective on or before 7/1/2024, from Acts 2,3, 6-535, and 580-647
The words "service car" shall be displayed on the windshield in plain view on all motor-driven vehicles coming under the provisions of R.S. 45:184 through 45:191.
La. R.S. § 45:190