United States v. California

1965-05-17

Headline: Court applies international treaty rules to define inland waters, upholds Monterey Bay but rejects broader island-based coastal claims, limiting how far California can reach to control offshore submerged lands.

Holding: The Court held that the Submerged Lands Act’s term "inland waters" should be defined by the ratified Convention’s rules (24‑mile/semi‑circle tests), awarding Monterey Bay to California but rejecting broader historic island-based claims.

Real World Impact:

Limits state claims to offshore submerged lands that fail Convention tests.
Clarifies who controls leasing and drilling in the three-mile belt.
Federal government decides straight‑baseline use for international boundary claims.

Topics: coastal boundaries, offshore oil rights, state vs federal ownership, territorial sea

Summary

Background

A long-running dispute between the United States and the State of California concerns who owns the land and minerals under coastal waters off California. The United States sued in 1945 and the Court’s 1947 decree awarded the federal government paramount rights seaward of the low-water mark and outside "inland waters" for a three-mile belt. A Special Master studied specific bays and channels and reported in 1952. Congress passed the Submerged Lands Act in 1953 granting states title to submerged lands within their boundaries but did not define "inland waters." The case was revived in the 1960s as offshore oil drilling became feasible.

Reasoning

The core question was what "inland waters" means under the Submerged Lands Act. The Court examined the legislative history and decided Congress left the legal definition to the courts. Because an international treaty — the Convention on the Territorial Sea and the Contiguous Zone — had been ratified, the Court adopted its rules (a 24‑mile maximum closing line for bays and the semicircle water‑area test). The Court held that Monterey Bay meets that test; the other disputed segments do not. The Court also held that whether to use straight baselines is a federal decision, that the marked low‑water line is the lower low‑tide line, and that artificially created land generally comes under state sovereignty.

Real world impact

The decision fixes the Act’s coastal baseline by reference to modern international rules, narrowing broad historic state claims where they fail the Convention tests. That clarity determines who controls leasing, drilling, and minerals in the three‑mile belt and reduces uncertainty about federal versus state authority. The Court approved the Special Master’s recommendations with modifications and directed entry of a decree to implement the ruling.

Dissents or concurrances

Justice Black (joined by Justice Douglas) dissented, arguing Congress intended to restore states’ historic boundaries and that the case should be remanded for new hearings so California could prove historic inland‑waters claims.