“ By virtue of the authority vested in me by section 1753 of the Revised Statutes of the United States, and as President of the United States, the Executive Order of January 17, 1873, as amended, prohibiting, with certain exceptions, Federal officers and employees from holding State, Territorial, and municipal offices, is hereby further amended so as to permit any person holding a State, Territorial, or municipal office to accept appointment and serve as a member of an Alien Enemy Hearing Board. ”