La. Stat. tit. 27 § 456
If a license has been issued to an applicant, who relied in good faith upon a parish boundary survey, including a certification from the proper zoning or surveying authorities, and the local governing authority has also relied upon the survey in good faith, and it is later determined through a subsequent survey that the licensed establishment is located all or in part in a parish in which the licensed activity is prohibited, the licensee shall be permitted to continue to operate based on the license issued on such good faith reliance. The provisions of this Section shall only apply to licenses issued to conduct gaming pursuant to the provisions of this Title prior to July 1, 2004. Regardless of any change in boundaries, there shall be no change in the distribution of any proceeds attributable to the licensed activity.
La. R.S. § 27:456