Section 1 Witnesses and documents in impeachment trials of a President or Vice President
“XXVII. In an impeachment trial of the President or the Vice President, upon whom the powers and duties of the Office of President shall have devolved, each party may move to issue 1 or more subpoenas to obtain testimony from witnesses. If the Presiding Officer determines the testimony of a witness for whom a subpoena is sought is material and relevant to the impeachment trial and not redundant, the Presiding Officer, through the Secretary of the Senate, shall issue a subpoena for the taking of testimony of the witness. A Senator may raise a point of order that a subpoena for the taking of testimony of a witness should not be issued. If a point of order is raised, the Presiding Officer shall submit the point of order to a vote of the Senate without debate. A vote under this Rule shall be taken in accordance with the Standing Rules of the Senate.
“XXVIII. In an impeachment trial of the President or the Vice President, upon whom the powers and duties of the Office of President shall have devolved, each party may move to issue 1 or more subpoenas to obtain documents. If the Presiding Officer determines the documents for which a subpoena is sought are material and relevant to the impeachment trial and not redundant, the Presiding Officer, through the Secretary of the Senate, shall issue a subpoena requiring production of the documents. A Senator may raise a point of order that a subpoena requiring production of the documents should not be issued. If a point of order is raised, the Presiding Officer shall submit the point of order to a vote of the Senate without debate. A vote under this Rule shall be taken in accordance with the Standing Rules of the Senate.
“XXIX. It shall not be in order to consider a resolution or motion establishing procedures for an impeachment trial, or an amendment thereto, that would modify, supersede, waive, or be inconsistent with any portion of Rule VII, XXVII, or XXVIII.”