Which agency regulates international water common carriers?

The Federal Maritime Commission is the correct agency that regulates international water common carriers. This agency's primary responsibility is to ensure a competitive and reliable international ocean transportation system and to protect the interests of U.S. shippers and consumers in the international maritime domain.

The Federal Maritime Commission oversees the activities of shipping companies and freight forwarders, ensuring compliance with established shipping laws and practices. Its functions include the licensing of ocean common carriers, monitoring shipping rates, and resolving disputes between shippers and carriers, which are vital for maintaining fair competition in international shipping markets.

Other agencies mentioned, such as the Federal Motor Carrier Safety Administration, focus on highway transportation safety and regulations, while the Federal Trade Commission deals with consumer protection and antitrust laws, and the Department of Transportation encompasses various transportation modes but does not specialize specifically in regulating international water carriers.