In essence, the assent given by the presumed insured persons is ineffective in subjecting the insurer to liability or exposure in a subsequent case raised by the applicant. All substantial amendments to the essential conditions of an approval decree covered by this Directive must be approved in the same way. 4 See z.B Burdette, 214 W. Va. v. United States, in which the Court used its power under the trade clause to regulate the Chicago Meat Trust as an illegal economic monopoly.   In Standard Oil Company of New Jersey vs. United States, the government used approval orders to lift John D. Ketchum`s horizontal monopoly limited the court`s role in approval orders to simply supporting an agreement already reached by the parties themselves.   With respect to antitrust regulations, swift & Co. against the United States, the first order of approval used in antitrust regulation under the Sherman Antitrust Act. With Swift & Co. against the United States, the Supreme Court ruled that an approval order could only be amended or terminated if, over time, new developments produce a “grave injustice” in the way the approval order decision affects the parties to the appeal.    The Supreme Court upheld this limited flexibility of approval orders in U.S.