La. Civ. Code art. 796
Current with changes from the 2024 legislative session effective on or before 7/1/2024, from Acts 2,3, 6-535, and 580-647
When visible markers have been erroneously placed by one of the contiguous owners alone, or not in accordance with a written agreement fixing the boundary, the error may be rectified by the court unless a contiguous owner has acquired ownership up to the visible bounds by thirty years possession.
La. C.C. § 796