La. R.S. 13:4986

R.S. 13:4985 through R.S. 13:4990 shall affect partitions heretofore or hereafter effected; provided that any co-owner of real property heretofore partitioned or his heirs or assigns, where one or more co-owners were not parties, shall have a period of six months from and after July 30, 1952, within which to file suit to set aside such partition, and if no such suit is filed within said period such partition shall be valid for all purposes as to the interest of the co-owners who were parties thereto.