La. Stat. tit. 33 § 140.59
Wherever the regulations made under the authority of this Sub-part require a greater width or size of side yards, courts or other open spaces, or require a lower height of buildings or lesser number of stories, or require a greater percentage of lot to be left unoccupied, or impose other higher standards than are required in any other statute or local ordinance or regulation, the provisions of the regulations made under the authority of this Sub-part shall govern. Whenever the provisions of any other statute, local ordinance or regulation require a greater width or size yards, courts or other open spaces, or require a greater percentage of lot be left unoccupied, or impose other higher standards than are required by the regulations made under the authority of this Sub-part, the provisions of such statute, local ordinance or regulation shall govern.
La. R.S. § 33:140.59