What is the world’s only global intergovernmental international tourism organization that comprehensively covers tourism matters?

The World Tourism Organization is the only global intergovernmental international tourism organization that comprehensively covers tourism matters. According to relevant public information inquiries, the World Tourism Organization only became the world's only global government agency comprehensively involved in tourism affairs in January 1975. The World Tourism Organization is an intergovernmental international organization of the United Nations system and a leading international organization in the field of tourism. It was first developed by the International Alliance of Official Tourism Promotion Organizations. It became a specialized agency of the United Nations in November 2003. 158 full member states and 6 associate members.