Lille is a French-Belgian bilingual Eurometropolis and the most important concentration of companies and inhabitants in any European frontier. Transborder co-operation initiatives are widely dispersed and very abundant. It is now about to pass through a decisive stage in its integration towards a structured and integrated development: 1. Because of the transformation of the COPIT, Permanent Conference Transborder Intercommunites, which until now had been an informal study structure as a development tool. 2. Because jurisdictions and administrative problems had been overcome, and had become an European laboratory of economic integration.