15 U.S.C. § 6a — Conduct involving trade or commerce with foreign nations

Sections 1 through 7 of this title — the core antitrust laws — normally don't apply to trade or commerce with foreign nations, except for import trade or import commerce, which stays covered. There's an exception that brings foreign conduct back under these laws: it applies if the conduct has a direct, substantial, and reasonably foreseeable effect either on trade or commerce that isn't with foreign nations, or on import trade or commerce with foreign nations, or on the export trade or export commerce of a person doing that trade in the United States. Even then, the conduct is only covered if that effect actually gives rise to a legal claim under sections 1 through 7 — not counting this section itself. There's one more limit: if sections 1 through 7 apply to the conduct only because of an effect on someone's export business (the second kind of effect described above), then those sections only apply to the extent of harm to that export business in the United States.