Security standards for ports are governed by the International Shipping and Port Security (ISPS) Code, which is based on U.S. maritime laws adopted after 9/11. The same law applies to any company operating in the U.S., regardless of its origin.Source: HeritageThe U.S. Coast Guard is responsible for overseeing the implementation of ISPS. Every U.S. port has a Coast Guard officer who is the Captain of the Port and is responsible for coordinating all port security. The Customs and Border Protection agency and the Coast Guard, not the owner of the port, conduct security screening on individuals and cargo that enter the port.