This article tries to answer two questions : 1) How does the cooperation between the Belgian and Flemish government work within the field of multilateral policy?; 2) How is the multilateral policy of the Belgian federation and the Flemish government received at the multilateral level? The Belgian constitution has foreseen a system in which all governments are equal. This has important consequences for Belgian delegations in multilateral fora : in 'mixed' dossiers, no government has decisive power. Thus, all Belgian governments (...) are objective allies in guarding the externally projected image of the federation. Nevertheless, this seems to be a 'grey area' in the cooperation among the various Belgian governments. (shrink)