PWSA has various meanings in the Governmental & Military category. Discover the full forms, definitions, and usage contexts of PWSA in Governmental & Military.
Congressional act that protects navigational safety and the resources of navigable waters. Under the act, vessel operators must notify port authorities of any "hazardous condition," which includes fire, leaking cargoes, or anything that could adversely affect the environmental quality of any US port, harbor, or navigable water.
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