The Secretary of the Interior and the Secretary of the Army shall cooperate in the study and formulation of plans for beach erosion control and hurricane protection of the seashore; and any such protective works that are undertaken by the Chief of Engineers, Department of the Army , shall be carried out in accordance with a plan that is acceptable to the Secretary of the Interior and is consistent with the purposes of sections 459f to 459f–11 of this title. ( Pub. L. 89–195, § 8 , Sept. 21, 1965 , 79 Stat. 827 .)