× Information on this section of ECOLEX comes from the InforMEA Portal which compiled information from MEA Secretariats with the support of the European Union. The accuracy of the information displayed is the responsibility of the originating data source. In case of discrepancy the information as displayed on the respective MEA website prevails. Amendments to the criteria for the inclusion of natural properties in the World Heritage List and guidelines for the evaluation of nominations by IUCN Tipo de documento Decision Número de referencia XI.(b).38 Fecha Oct 22, 1979 FuenteUNEP, InforMEA Estado Activo Materia Especies silvestres y ecosistemas Tratado Convención para la Protección del Patrimonio Mundial, Cultural y Natural (Nov 23, 1972) Reunión 3e session du Comité Página web whc.unesco.org Resumen The Committee decided to instruct IUCN to use great caution in the application of criterion (iv) when it was the sole criterion for recommending sites for the World Heritage List. The sites nominated under this criterion should be habitats where "significant populations" or "concentrations of populations" of rare or endangered species of plants or animals survive, that is, sites representing in some way "superlative situations".