“ Scientists, engineers, and other technically qualified professionals who are officers or employees of departments and agencies of the executive branch of the Government are encouraged to participate in the work of the Council as requested by the Council to the extent authorized by the head of the officer's or employee's agency or department and permitted by law. ”

“ National Research Council of the National Academy of Sciences
‘‘Whereas (1) the congressional charter of the National Academy of Sciences ('Academy') charges it, upon call from any U.S. Government Department, to investigate, examine, experiment, and report upon any subject of science or art and (2) the actual expenses of the Academy for such investigations, examinations, experiments, and reports shall be paid to the Academy through one or more of the following: private gifts and bequests; appropriations for the benefit of the Academy ”