La. Revenue and Taxation § 47:1978
Whenever lands or other property are overflowed by the waters of the Mississippi River, or by the waters of any other river, lake, bayou, or backwater, the assessors within whose parishes such lands or other property may be situated, shall re-assess such lands or property for their actual cash value, and in so doing they shall specially take into consideration all the damages to the lands or property and the depreciation of the value of such land or property caused by the overflow. The assessors throughout the state shall make these reassessments whether the time fixed by law for filing assessment rolls has elapsed or not, and in case of re-assessments, as provided by this Section, the assessor shall prepare supplemental rolls of overflowed lands and other overflowed property, which they shall file in the manner provided by law for general assessment rolls; such re-assessment shall be subject to the same rights as to contest as to assessment generally.
La. Revenue and Taxation § 47:1978