Exxon Mobil Corp. v. Corporación Cimex, S. A. (Cuba) · ¶64

Why does that matter? Because a suit under the FSIA is not a federal-question suit. Suits subject to the FSIA are governed by 28 U. S. C. §1330, which affords district courts original jurisdiction over civil actions against foreign states—provided that the suit qualifies under one of the FSIA’s exceptions. So ordinarily, a federal district court possesses jurisdiction over a suit against a foreign state, agency, or instrumentality only if a plaintiff invokes an FSIA exception. But §1331 contains no such threshold requirement.

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