Some Caribbean islands take advantage of flag of convenience policies followed by foreign merchant fleets, registering the ships in Caribbean ports. The registry of ships at "flag of convenience" ports is protected by the Law of the Sea and other international treaties. These treaties leave the enforcement of labour, tax, health and safety, and environmental laws under the control of the registry, or "flag" country, which in practical terms means that such regulations seldom result in penalties against the merchant ship. The Cayman Islands, Bahamas, Antigua, Bermuda, and St. Vincent are among the top 11 flags of convenience in the world. However, the flag of convenience practice has been a disadvantage to Caribbean islands as well, since it also applies to cruise ships, which register outside the Caribbean and thus can evade Caribbean enforcement of the same territorial laws and regulations.