La. R.S. 9:2973

Any person who has made a transfer or other grant affecting land so described, their heirs or assigns, whose rights may be affected hereby, shall have a period of one year from August 1, 1956, within which to preserve and protect such rights, by: (a) filing suit in each parish where such land is situated, asserting such rights, or (b) by recording a notarized declaration asserting such rights in the conveyance records of each parish where such land is situated within such one year period; and in case neither said method of preserving such rights is followed within one year from August 1, 1956, said rights shall be forever barred.