28/11/2003 (Agence Europe) - The lack of a bridging clause in the Constitution allowing enhanced cooperation in the economic field could make the economies of the euro zone "slam the door" in the face of the Union and draw closer to each other outside the institutions and procedures of the 25, the president of the EP French Socialist Delegation, Pervenche Perès, states in a press release. "The road is now open for the EU to crumble apart", she said.