States as international persons — Sovereignty — Conduct of foreign relations, conclusiveness of statements of the Executive — Determination by Department of State that sovereign immunity need not be extended to Bank of Korea binding upon Court — The law of the United States

Jurisdiction — In general — Territorial — Exemption from jurisdiction — Immunity from suit of foreign States — Restrictive theory — Tate Letter, 1952 — Refusal of Department of State to suggest that sovereign immunity be extended to Bank of Korea — Determination by Department of State binding upon Court — The law of the United States