No industry will work without implementing rules and regulations. This includes big cruise ship companies as it is imperative that they follow applicable laws.
The United States Public Health or USPH ratings are taken as the gold standard among cruise ship companies around the world as to the quality of hygiene on their vessels. Ships are inspected typically twice a year, and these visits come unannounced. This means that inspectors from the Center for Disease Control – which sets the USPH rules – are able to observe a vessel as it functions on a regular day. Cruise ship inspections take place under the USPH Vessel Sanitation Program.
For this reason, cruise ships all over the world must have the corresponding signages and posts that announce their compliance to industry standards when it comes to safety, cleanliness, and security.