18 U.S.C. § 1001 : US Code - Section 1001: Statements or entries generally

      (a) Except as otherwise provided in this section, whoever, in any
    matter within the jurisdiction of the executive, legislative, or
    judicial branch of the Government of the United States, knowingly
    and willfully - 
        (1) falsifies, conceals, or covers up by any trick, scheme, or
      device a material fact;
        (2) makes any materially false, fictitious, or fraudulent
      statement or representation; or
        (3) makes or uses any false writing or document knowing the
      same to contain any materially false, fictitious, or fraudulent
      statement or entry;

    shall be fined under this title, imprisoned not more than 5 years
    or, if the offense involves international or domestic terrorism (as
    defined in section 2331), imprisoned not more than 8 years, or
    both. If the matter relates to an offense under chapter 109A, 109B,
    110, or 117, or section 1591, then the term of imprisonment imposed
    under this section shall be not more than 8 years.
      (b) Subsection (a) does not apply to a party to a judicial
    proceeding, or that party's counsel, for statements,
    representations, writings or documents submitted by such party or
    counsel to a judge or magistrate in that proceeding.
      (c) With respect to any matter within the jurisdiction of the
    legislative branch, subsection (a) shall apply only to - 
        (1) administrative matters, including a claim for payment, a
      matter related to the procurement of property or services,
      personnel or employment practices, or support services, or a
      document required by law, rule, or regulation to be submitted to
      the Congress or any office or officer within the legislative
      branch; or
        (2) any investigation or review, conducted pursuant to the
      authority of any committee, subcommittee, commission or office of
      the Congress, consistent with applicable rules of the House or