Didier Reynders, who will chair the informal meeting of EU finance ministers in Brussels later this week, told a conference that the so-called ??passport? idea commanded support from a large majority among member states.
But he acknowledged there was not unanimity and stressed that the presidency did not want to push the new rules through by demanding that states vote.
France, in particular, is thought to be unhappy about the idea, in spite of efforts by Belgian diplomats to devise compromise measures.