Official correspondence of Vice President and Members of Congress

§ 4161. Official correspondence of Vice President and Members of Congress The Vice President, Members and Members-elect of Congress, the Secretary of the Senate, and the Sergeant at Arms of the Senate until the thirtieth day of June following the expiration of their respective terms of office, may send as franked mail— (1) matter, not exceeding four pounds in weight, upon official or departmental business, to a Government official; and (2) correspondence, not exceeding four ounces in weight, upon official business to any person. In the event of a vacancy in the office of Secretary of the Senate or Sergeant at Arms of the Senate, any authorized person may exercise this privilege in the officer’s name during the period of the vacancy.