La. Stat. tit. 51 § 331
No person, doing business in Louisiana, and engaged in the production, manufacture, or distribution of any commodity in general use, who shall, intentionally, for the purpose of injuring or destroying the business of a competitor in any locality, discriminate between different sections, communities, cities, or localities in the state by selling such commodity at a lower rate in one section, community, city, or locality, than is charged for the commodity by such person in another section, community, city, or locality, after making due allowance for the difference if any, in the grade or quality of the commodity and in the actual cost of transportation of the commodity from the point of production, if a raw product, or from the point of manufacture, if a manufactured product. All sales so made shall be prima facie evidence of unfair discrimination.
La. R.S. § 51:331