The 1972 Convention: The Convention Concerning the Protection of the World Cultural and Natural Heritage was adopted by the UNESCO General Conference on 16 November 1972 in Paris. Its defining feature is that it links, in a single instrument, the conservation of nature and the preservation of cultural properties. Sites are inscribed only if they possess Outstanding Universal Value (OUV) — cultural and/or natural significance so exceptional as to transcend national boundaries and be of common importance to humanity. India ratified the Convention in 1977.
The World Heritage Committee — composed of representatives from 21 States Parties elected by the General Assembly — takes the final inscription decisions at its annual sessions and maintains the World Heritage List.
The selection criteria: A site must meet at least one of ten criteria. Six (criteria i-vi) pertain to cultural value (e.g., masterpieces of human creativity, exceptional testimony to a civilisation), and four (criteria vii-x) to natural value — superlative natural phenomena, major stages of Earth's history, ongoing ecological processes, and significant natural habitats for biodiversity. The seven new Indian entries are pitched primarily on the geological/geomorphological criteria.
What the Tentative List is: The Tentative List is an inventory of properties a State Party intends to nominate in the coming years. It is the first and mandatory step — only sites already on the Tentative List can be taken up for formal nomination, and a property must usually sit on the list at least one year before a nomination dossier is submitted. Listing here is therefore not inscription; it is an official signal of intent and a precondition to the full nomination-evaluation-inscription cycle.