The Secretary of the Interior (hereinafter referred to as the ''Secretary'') is authorized and directed to cause the National Park Service to make a comprehensive study, other than on lands under the jurisdiction of the Department of Agriculture, of the public park, parkway, and recreational-area programs of the United States, and of the several States and political subdivisions thereof, and of the lands throughout the United States which are or may be chiefly valuable as such areas, but no such study shall be made in any State without the consent and approval of the State officials, boards, or departments having jurisdiction over such lands and park areas. The said study shall be such as, in the judgment of the Secretary, will provide data helpful in developing a plan for coordinated and adequate public park, parkway, and recreational-area facilities for the people of the United States. In making the said study and in accomplishing any of the purposes of this section and sections 17l to 17n of this title, the Secretary is authorized and directed, through the National Park Service, to seek and accept the cooperation and assistance of Federal departments or agencies having jurisdiction of lands belonging to the United States, and may cooperate and make agreements with and seek and accept the assistance of other Federal agencies and instrumentalities, and of States and political subdivisions thereof and the agencies and instrumentalities of either of them