15.c) "[The World Heritage Committee encourages States Parties to] (…) be proactive in relation to development and conservation of World Heritage properties by conducting a Strategic Environmental Assessment (SEA) at the time of nomination to anticipate the impact of any potential development on the Outstanding Universal Value."
4. "[The World Heritage Committee] reiterates that due to the complexity of mixed site nominations and their evaluation, States Parties should ideally seek prior advice from IUCN and ICOMOS, if possible at least two years before a potential nomination is submitted, in compliance with Paragraph 122 of the Operational Guidelines."
The World Heritage committee recommends addressing landscape surveys and the historic evolution of the landscape, as a holistic reflection of history and cultural traditions and of the interaction between culture and nature, including the way the landscape has been shaped by human practices and natural resources (based on Case law on decisions on Nominations).
4. Encourages States Parties to integrate the notion of historic urban landscape in nomination proposals and in the elaboration of management plans of properties nominated for inscription on the World Heritage List;
5. Also encourages States Parties to integrate the principles expressed in the Vienna Memorandum into their heritage conservation policies;
6. Requests the Advisory Bodies and the World Heritage Centre to take into account the conservation of the historic urban landscape when reviewing any potential impact on the integrity of an existing World Heritage property, and during the nomination evaluation process of new sites."