17 U.S.C. § 602 : US Code - Section 602: Infringing importation or exportation of copies or phonorecords

      (a) Infringing Importation or Exportation. - 
        (1) Importation. - Importation into the United States, without
      the authority of the owner of copyright under this title, of
      copies or phonorecords of a work that have been acquired outside
      the United States is an infringement of the exclusive right to
      distribute copies or phonorecords under section 106, actionable
      under section 501.
        (2) Importation or exportation of infringing items. -
      Importation into the United States or exportation from the United
      States, without the authority of the owner of copyright under
      this title, of copies or phonorecords, the making of which either
      constituted an infringement of copyright, or which would have
      constituted an infringement of copyright if this title had been
      applicable, is an infringement of the exclusive right to
      distribute copies or phonorecords under section 106, actionable
      under sections 501 and 506.
        (3) Exceptions. - This subsection does not apply to - 
          (A) importation or exportation of copies or phonorecords
        under the authority or for the use of the Government of the
        United States or of any State or political subdivision of a
        State, but not including copies or phonorecords for use in
        schools, or copies of any audiovisual work imported for
        purposes other than archival use;
          (B) importation or exportation, for the private use of the
        importer or exporter and not for distribution, by any person
        with respect to no more than one copy or phonorecord of any one
        work at any one time, or by any person arriving from outside
        the United States or departing from the United States with
        respect to copies or phonorecords forming part of such person's
        personal baggage; or
          (C) importation by or for an organization operated for
        scholarly, educational, or religious purposes and not for
        private gain, with respect to no more than one copy of an
        audiovisual work solely for its archival purposes, and no more
        than five copies or phonorecords of any other work for its
        library lending or archival purposes, unless the importation of
        such copies or phonorecords is part of an activity consisting
        of systematic reproduction or distribution, engaged in by such
        organization in violation of the provisions of section
        108(g)(2).

      (b) Import Prohibition. - In a case where the making of the
    copies or phonorecords would have constituted an infringement of
    copyright if this title had been applicable, their importation is
    prohibited. In a case where the copies or phonorecords were
    lawfully made, United States Customs and Border Protection has no
    authority to prevent their importation. In either case, the
    Secretary of the Treasury is authorized to prescribe, by
    regulation, a procedure under which any person claiming an interest
    in the copyright in a particular work may, upon payment of a
    specified fee, be entitled to notification by United States Customs
    and Border Protection of the importation of articles that appear to
    be copies or phonorecords of the work.