28 U.S. Code § 1607. Counterclaims
In any action brought by a foreign state, or in which a foreign state intervenes, in a court of the United States or of a State, the foreign state shall not be accorded immunity with respect to any counterclaim—
arising out of the transaction or occurrence that is the subject matter of the claim of the foreign state; or
to the extent that the counterclaim does not seek relief exceeding in amount or differing in kind from that sought by the foreign state.
2008—Subsec. (a). Pub. L. 110–181 inserted “or 1605A” after “section 1605”.
Effective Date of 2008 Amendment