The ICOMOS procedure for evaluating nominations to the World Heritage List
4 Referred back nominations and requests for minor modifications
On 1st February preceding the World Heritage Committee meeting, ICOMOS also receives supplementary information on nominations referred back during previous sessions of the Committee. As indicated above, ICOMOS does not organise technical evaluation missions for the evaluation of this supplementary information. Such supplementary information is examined by the World Heritage Working Group, at its March meeting.
ICOMOS also examines requests for "minor" modifications to boundaries or creation of buffer zones, and for changes of criteria or name for some properties already inscribed on the World Heritage List.