The criteria for selection To be included on the World Heritage List, sites must satisfy the selection criteria. These criteria are explained in the Operational Guidelines which, besides the text of the Convention, is the main document on World Heritage. The criteria have been revised regularly by the Committee to match the evolution of the World Heritage concept itself. Equally important is the authenticity of the site and the way it is protected and managed. The protection, management and integrity of the site are also important considerations.
Mixed sites have both outstanding natural and cultural values.
Since 1992 significant interactions between people and the natural environment have been recognized as cultural landscapes. Protecting endangered sites World Heritage conservation is a continuous process. The credibility of World Heritage stems from countries' regular reporting on the condition of sites, on measures taken to preserve them, and on their efforts to raise public awareness of cultural and natural heritage. If a country is not fulfilling its obligations under the Convention, it risks having its sites deleted from the World Heritage List. If the alert is justified, and the problem serious enough, the site will be placed on the List of World Heritage in Danger .