15 U.S.C. § 1 : US Code - Section 1: Trusts, etc., in restraint of trade illegal; penalty

      Every contract, combination in the form of trust or otherwise, or
    conspiracy, in restraint of trade or commerce among the several
    States, or with foreign nations, is declared to be illegal. Every
    person who shall make any contract or engage in any combination or
    conspiracy hereby declared to be illegal shall be deemed guilty of
    a felony, and, on conviction thereof, shall be punished by fine not
    exceeding $100,000,000 if a corporation, or, if any other person,
    $1,000,000, or by imprisonment not exceeding 10 years, or by both
    said punishments, in the discretion of the court.