adopted by the General Conference of UNESCO on 16 November 1972. The Convention came into force on 17 December 1975. As of March 2022, it has been ratified by 194 states: 190 UN member states, 2 UN observer states (the Holy See and the State of Palestine), and 2 states in free association with New Zealand (the Cook Islands and Niue). Only three UN member states have not ratified the convention: Liechtenstein, Nauru, and Tuvalu. Objectives and positive results By assigning places as World Heritage Sites, UNESCO wants to help to pass them on to future generations. Its motivation is that "[h]eritage is our legacy from the past, what we live with today" and that both cultural and natural heritage are "irreplaceable sources of life and inspiration". UNESCO's mission with respect to World Heritage consists of eight sub targets. These include encouraging the commitment of countries and local population to World Heritage conservation in various ways, providing emergency assistance for sites in danger, offering technical assistance and professional training, and supporting States Parties' public awareness-building activities. Being listed as a World Heritage Site can positively affect the site, its environment, and interactions between them. A listed site gains international recognition and legal protection, and can obtain funds from among others the World Heritage Fund to facilitate its conservation under certain conditions. UNESCO reckons the restorations of the following four sites among its success stories: Angkor in Cambodia, the Old City of Dubrovnik in Croatia, the Wieliczka Salt Mine near Kraków in Poland, and the Ngorongoro Conservation Area in Tanzania. Additionally, the local population around a site may benefit from significantly increased tourism revenue. When there are significant interactions between people and the natural environment, these can be recognised as "cultural landscapes". Nomination process A country must first identify its significant cultural and natural sites in a document known as the Tentative List. Next, it can place sites selected from that list into a Nomination File, which is evaluated by the International Council on Monuments and Sites and the World Conservation Union. A country may not nominate sites that have not been first included on its Tentative List. The two international bodies make recommendations to the World Heritage Committee for new designations. The Committee meets once a year to determine what nominated properties to add to the World Heritage List; sometimes it defers its decision or requests more information from the