The Ports and Waterways Safety Act (PWSA) authorizes, but does not require, the United States Coast Guard to enact prophylactic measures for regulating ocean vessel traffic, protecting waterway navigation, and protecting the marine environment. I The United States Supreme Court recently decided that individual states do not have the authority to enact oil tanker laws and regulations that are more restrictive than the federal
PWSA. Citing the Supremacy Clause, z the Supreme Court, in United States v. Locke, 3 held that a federal determination that a vessel is sufficiently safe to navigate United States waters trumps contrary or inconsistent state determinations.
United States v. Locke, 529 U.S. 89 (2000),
San Diego L. Rev.
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