The Secretary of the Interior, with respect to lands added or transferred by this Act to Rocky Mountain National Park, and the Secretary of Agriculture, with respect to lands added or transferred by this Act to Roosevelt and Arapaho National Forests, may acquire lands and interests in such lands, by donation, purchase with donated or appropriated funds, or by exchange. The Secretary of Agriculture, under sections
of this title, may accept on behalf of the United States title to any land in section
, township 7 north, range 73 west, of the sixth principal meridian which lies within the boundary of Rocky Mountain National Park as revised by this Act, in exchange for which the Secretary of the Interior, notwithstanding section
of this title, is authorized to issue patent to lands lying within the Cache La Poudre Wild and Scenic River study corridor. Upon completion of the exchange, the Secretary of Agriculture shall transfer to the administrative jurisdiction by the Secretary of the Interior the portion of such land lying within the boundary of the Rocky Mountain National Park as revised by this Act.