Sea — Historic bays — Status as internal waters — Criteria for determination of historic bay — Ownership of submerged lands under historic bay — Sovereignty historically exercised by United States over Mississippi Sound as inland waters — Mississippi and Alabama entitled to claim Sound as historic bay and inland waters and entitled to ownership of submerged lands thereunder — Convention on the Territorial Sea and Contiguous Zone, 1958 — United States Submerged Lands Act 1953 — The law of the United States