The foregoing program shall be administered in accordance with the provisions of this subchapter and existing laws relating to Indian affairs, shall include such facilities and services as are requisite for or incidental to the effectuation of the projects herein enumerated, shall apply sustained-yield principles to the administration of all renewable resources, and shall be prosecuted in a manner which will provide for completion of the program, so far as practicable, within ten years from April 19, 1950. An account of the progress being had in the rehabilitation of the Navajo and Hopi Indians, and of the use made of the funds appropriated to that end under this subchapter, shall be included in each annual report of the work of the Department of the Interior submitted to the Congress during the period covered by the foregoing program.