    [United States Senate Manual, 113th Congress]
    [S. Doc. 113-1]
    [Standing Rules of the Senate]
    [Page 20]
    [From the U.S. Government Publishing Office, www.gpo.gov]

            21                            RULE XXI

                                  SESSION WITH CLOSED DOORS

          21.1      1. On a motion made and seconded to close the doors of
                the Senate, on the discussion of any business which may, in
                the opinion of a Senator, require secrecy, the Presiding
                Officer shall direct the galleries to be cleared; and during
                the discussion of such motion the doors shall remain closed.
          21.2      2. When the Senate meets in closed session, any
                applicable provisions of rules XXIX and XXXI, including the
                confidentiality of information shall apply to any
                information and to the conduct of any debate transacted.