22 Miss. Code. R. 23-06-104
All uses in coastal wetlands being legally conducted as of the adoption of Title 22, Part 23 are allowed to continue to the extent provided under existing legal authorization. Normal repair and maintenance of existing and functioning structures above the watermark of mean high tide does not require a permit. All structures below the watermark of mean high tide require prior authorization before repair or alteration and any alteration of location, size, or configuration of an existing structure requires prior authorization. Failed structures that are not serving the purpose for which they were constructed must conform to current guidelines. Failing structures may be granted authorization for repairs in their original location, size, configuration and design at the discretion of the Executive Director or their delegate
22 Miss. Code. R. 23-06-104