“That all right, title, and interest of the United States in and to the lands, together with the improvements thereon, included in the former Fort Apache Military Reservation, created by Executive order of February 1, 1877, and subsequently set aside by the Act of January 24, 1923 (42 Stat. 1187) [this section], as a site for the Theodore Roosevelt School, located within the boundaries of the Fort Apache Indian Reservation, Arizona, are hereby declared to be held by the United States in trust for the White Mountain Apache Tribe, subject to the right of the Secretary of the Interior to use any part of the land and improvements for administrative or school purposes for as long as they are needed for that purpose.”