Da regeringen i Beograd i juli 1993 nægtede at forlænge gyldighedsperioden for aftalen om missionen, støttede Den Europæiske Union de klager, der var fremsat som led i CSCE mod denne afgørelse, og FN-Sikkerhedsrå-dets resolution 855 af 9. august 1993, hvori Serbien og Montenegro udtrykkeligt blev opfordret til at tillade, at langtidsmissionens virke blev fortsat.
When the Belgrade Government refused in July 1993 to extend the memorandum of understanding on the mission, the European Union supported appeals against this decision in the CSCE framework, as well as UN Security Council Resolution 855 of 9 August 1993, in which Serbia and Montenegro were expressly called upon to authorize the continuation of the work of the longterm mission.