The Board of Trustees of the University of Illinois is authorized to enter into a contract or contracts of any description and to perform the same, with the United States for the erection of any building or buildings which, in the judgment of the Board, are actually and reasonably necessary in order to operate efficiently the University of Illinois in all its branches, departments and divisions; such contracts for a building or buildings as aforesaid, are authorized only when entered into in order to make available to the University of Illinois the benefits and provisions of H. J. R. 11, 74th Congress, H. J. R. 117, approved April 8, 1935, and entitled “Joint resolution making appropriations for relief purposes,” the National Industrial Recovery Act and other Congressional acts intended to relieve the unemployed and to aid the processes of national recovery.