other private or governmental legal entity that owns an interest in land in the affected area. (4) Secretary The term Secretary means the Secretary, acting through the Director of the Bureau of Land Management. (5) South bank The term South Bank means the water-washed and relatively permanent elevation or acclivity (commonly known as a cut bank ) along the southerly or right side of the Red River that— (A) separates the bed of that river from the adjacent upland, whether valley or hill