In a suit alleging defendants, who are ocean common carriers and here transported vehicles, entered into agreements to fix prices and reduce capacity in violation of federal antitrust laws and various state laws, the district court's dismissal of the complaint is affirmed where: 1) defendants allegedly engaged in acts prohibited by the Shipping Act of 1984, 46 U.S.C. section 40101 et seq.; and 2) the Act both precludes private plaintiffs from seeking relief under the federal antitrust laws for such conduct and preempts the state law claims under circumstances like those presented here.