Final answer:
Each container that enters the U.S. aboard a ship from another country is subject to ballast water management regulations enforced by the US Coast Guard and the Environmental Protection Agency.
Step-by-step explanation:
Each container that enters the U.S. aboard a ship from another country is subject to ballast water management regulations. These regulations are enforced by the US Coast Guard and the Environmental Protection Agency to prevent the introduction and spread of invasive species through ballast water. The National Ballast Information Clearinghouse collects data on ballast water delivery in US waters, and ships are required to submit a Ballast Water Report containing information about the ship, transit details, and ballast water history.