Tentative List Process from WHC Website

"A Tentative List is an inventory of those properties which each State Party intends to consider for nomination during the following years.
States Parties are encouraged to submit in their Tentative Lists, properties which they consider to be cultural and/or natural heritage of outstanding universal value and therefore suitable for inscription on the World Heritage List.

States Parties are encouraged to prepare their Tentative Lists with the participation of a wide variety of stakeholders, including site managers, local and regional governments, local communities, NGOs and other interested parties and partners.

States Parties should submit Tentative Lists, which should not be considered exhaustive, to the World Heritage Centre, preferably at least one year prior to the submission of any nomination. States Parties are encouraged to re-examine and re-submit their Tentative List at least every ten years.

States Parties are requested to submit their Tentative Lists using a Tentative List Submission Format, in English or French, containing the name of the properties, their geographical location, a brief description of the properties, and justification of their outstanding universal value.

Nominations to the World Heritage List will not be considered unless the nominated property has already been included on the State Party's Tentative List."