The document on this item which proposed a procedure with respect to the deletion of properties from the World Heritage List was introduced by Mr. Bolla who drew attention to the different stages in the proposed procedure. A wide exchange of ideas ensued, during which several participants expressed the hope that the State Party on whose territory the property was located would inform the Secretariat of the Committee if any property inscribed on the List had seriously deteriorated and others drew attention to the obligation contracted by the States Parties under the Convention to properly preserve the properties entered on the List.