In all cases where the Register of the State Land Office has caused a township, or one or more sections thereof, to be surveyed or resurveyed, field notes of this survey and the map or plat thereof shall be filed in the State Land Office. When the survey or re-survey and the maps or plat thereof are approved by the Register of the State Land Office, they shall be the official survey and map or plat of the township or section or sections thereof.
La. R.S. § 50:126