; (B) respecting private property rights; (C) allowing appropriate maintenance of existing infrastructure; and (D) allowing historical uses to continue. (b) Purpose The purpose of this Act is to designate certain segments and tributaries of the Missouri River and Yellowstone River Headwaters in the State of Montana as components of the National Wild and Scenic Rivers System to preserve and protect for present and future generations the outstandingly remarkable values of each stream and tributary. 3. Definitions In this Act: (1) Covered segment The term covered segment means a river segment designated by paragraphs (233) through (252) of section 3(a) of the Wild and Scenic Rivers Act ( 16 U.S.C. 1274(a) ) (as added by section 4(a)). (2) Indian Tribe The term Indian Tribe has the meaning given the term in section 4 of the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 5304 ). (3) Secretary concerned The term Secretary concerned means— (A) the Secretary of the Interior, with respect to a covered segment under the jurisdiction of the Secretary of the Interior