La. Stat. tit. 9 § 1701
Whenever the United States, or any branch or agency thereof, has acquired a servitude, easement, or real right of any kind, nature, or description affecting a piece of land, or a portion thereof, which is owned in indivision, and said servitude, easement, or real right was acquired from less than all the co-owners of said tract of land, or whenever the United States, or any branch or agency thereof, has acquired a servitude, easement, or real right of any kind, nature or description affecting a tract of land, or a portion thereof, which is owned in indivision, and said acquisition having been from a co-owner, or a portion of the co-owners, insofar as his or their undivided interest in the tract of land or portion thereof is concerned, a subsequent suit for a partition thereof among the co-owners shall not affect the rights held by the United States, or any branch or agency thereof, in and to the land sought to be partitioned, nor shall the United States be made a party thereto, but said partition shall be made subject to the rights held by the United States, or any branch or agency thereof.
The provisions of this Section shall be considered remedial, retrospective, and retroactive in operation, as well as prospective in operation.
La. R.S. § 9:1701