In a case about to be heard by the U.S. Supreme Court, Credit Suisse v. Billing, an issue of conflict between regulatory regimes will be addressed. The two regimes are the U.S. antitrust laws and the U.S. securities laws. The type of conflict is that the U.S. securities laws permit activity that the antitrust laws prohibit. See the Department of Justice's brief. It is interesting that in U.S. domestic law, we do not have a general or generic method of defining and resolving these types of "inter-functional" conflict. Of course, similar issues arise in connection with definitions and resolutions of conflict between trade law and environmental law, etc.