What is the deadline by which a State Party should submit its candidature?

As per Rule 13.1 of the Rules of procedure of the General Assembly, candidatures should be sent to the Secretariat at least six weeks prior to the opening of the General Assembly.

As per Rule 13.4, this list of candidatures shall be finalised 48 hours before the opening of the General Assembly. No other candidatures nor payments of compulsory and voluntary contributions to the World Heritage Fund (for the purpose of presenting a candidature to the Committee) will be accepted in the 48-hour period prior to the opening of the General Assembly.

Candidatures should be sent to the following address:
The Director
UNESCO World Heritage Centre
7 place de Fontenoy
75352 Paris 07 SP, France

As per article 16.5 of the Convention:

"Any State Party to the Convention which is in arrears with the payment of its compulsory or voluntary contribution for the current year and the calendar year immediately preceding it shall not be eligible as a Member of the World Heritage Committee, although this provision shall not apply to the first election."