In accordance with Resolution A. 720 (17) of the International Maritime Organization (IMO), in paragraphs 1.4.8.1; 1.4.8.2; and 3.8.5. In order to protect the National Marine Park, the area known as the "Veracruz Reef System" from the risk of physical damage and pollution, due to maritime accidents that may occur within the "A" precautionary zone. All ships of 500 gross tonnage or more, as well as those that transport substances potentially harmful to human life or the preservation of the marine environment, will use the pilotage service to cross the aforementioned precautionary area; for this purpose, a pilot station is established in the precautionary area "B". According to the Official Journal of the Federation of July 17, 1998.