901, 909-912 (1969). Thus, sovereign immunity determinations were made in two different branches, subject to a variety of factors, sometimes including diplomatic considerations. Not surprisingly, the governing standards were neither clear nor uniformly applied. See, e. g., id., at 906-909; Weber, The Foreign Sovereign Immunities Act of 1976: Its Origin, Meaning and Effect, 3 Yale Studies in World Public Order 1, 11-13, 15-17 (1976).
In 1976, Congress passed the Foreign Sovereign Immunities Act in order to free the Government from the case-by-case diplomatic pressures, to clarify the governing standards, and to “assurfe] litigants that . . . decisions are made on purely legal grounds and under procedures that insure due process,” H. R. Rep. No. 94-1487, p. 7 (1976). To accomplish these objectives, the Act contains a comprehensive set of legal standards governing claims of immunity in every civil action against a foreign state or its political subdivisions, agencies, or instrumentalities.
For the most part, the Act codifies, as a matter of federal law, the restrictive theory of sovereign immunity. A foreign state is normally immune from the jurisdiction of federal and state courts, 28 U. S. C. § 1604, subject to a set of exceptions specified in §§ 1605 and 1607. Those exceptions include actions in which the foreign state has explicitly or impliedly waived its immunity, § 1605(a)(1), and actions based upon commercial activities of the foreign sovereign carried on in the United States or causing a direct effect in the United States, § 1605(a)(2).11 When one of these or the other specified exceptions applies, “the foreign state shall be liable in
11
The Act also contains exceptions for certain actions “in which rights in property taken in violation of international law are in issue,” § 1605(a)(3); actions involving rights in real estate and in inherited and gift property located in the United States, § 1605(a)(4); actions for certain noncommercial torts within the United States, § 1605(a)(5); certain actions involving maritime liens, § 1605(b); and certain counterclaims, § 1607.