For necessary expenses for the White House as authorized by law, including not to exceed $3,850,000 for services as authorized by 5 U.S.C. 3109 and 3 U.S.C. 105; subsistence expenses as authorized by 3 U.S.C. 105, which shall be expended and accounted for as provided in that section; hire of passenger motor vehicles, newspapers, periodicals, teletype news service, and travel (not to exceed $100,00