The Secretary shall furnish to the Council an executive secretary and such secretarial, clerical, and other services as are deemed necessary for the conduct of its business. Members of the Council, while away from their home or regular places of business, may be allowed travel expenses, including per diem in lieu of subsistence, as authorized by section
5703 of title
5. Payments under this section shall not render members of the Council officers or employees of the United States for any purpose.