La. Stat. tit. 33 § 130.31
The governing authority of any parish acting pursuant to power granted in R.S. 39:551.2 may by the adoption of an appropriate resolution, or ordinance if required by home rule charter, create one or more industrial districts. Such resolution or ordinance shall define the boundaries of each such district, shall give the district an appropriate name, and shall prescribe such powers, duties, and liabilities therefor not inconsistent with R.S. 39:551.2 as may be deemed suitable by said governing authority. All industrial districts so created hereafter shall require or include provisions for access by public road to any and all entrances to the premises of each and every plant in the area employed for industrial purposes, for use by employees of such industry, or for use by employees of independent contractors working on such premises, or for delivery of materials or supplies, other than by rail or water transportation, to such premises. Where under any plan approved by the governing authority of the parish individual plants provide police protection, this protection shall be confined to the premises of each individual plant located therein.
La. R.S. § 33:130.31