Ex. Ord. No. 6161, June 8, 1933, provided:

In accordance with the provisions of section 22 and section 23 of the Tennessee Valley Authority Act of 1933 [sections 831u and 831v of this title], the President hereby authorizes and directs the Board of Directors of the Tennessee Valley Authority to make such surveys, general plans, studies, experiments, and demonstrations as may be necessary and suitable to aid the proper use, conservation, and development of the natural resources of the Tennessee River drainage basin, and of such adjoining territory as may be related to or materially affected by the development consequent to this act, and to promote the general welfare of the citizens of said area; within the limits of appropriations made therefor by Congress.