“The Committee may wish to bear in mind the following supplementary factors when considering the inclusion of a cultural or natural property in the List of World Heritage in Danger:
a) Decisions which affect World Heritage properties are taken by Governments after balancing all factors. The advice of the World Heritage Committee can often be decisive if it can be given before the property becomes threatened.
b) Particularly in the case of ascertained danger, the physical or cultural deteriorations to which a property has been subjected should be judged according to the intensity of its effects and analyzed case by case.
c) Above all in the case of potential danger to a property, one should consider that:
i) the threat should be appraised according to the normal evolution of the social and economic framework in which the property is situated;
ii) it is often impossible to assess certain threats such as the threat of armed conflict as to their effect on cultural or natural properties;
iii) some threats are not imminent in nature, but can only be anticipated, such as demographic growth.
d) Finally, in its appraisal the Committee should take into account any cause of unknown or unexpected origin which endangers a cultural or natural property.”