The EU-funded program INTERREG was designed to avoid the national boundaries to be an obstacle nor to the balanced territorial development nor to the integration of the European territory. Besides, its aim was an integrated action for the economic development and economic and social cohesion. This initiative has been quite relevant for Spain, which has become one of the most to benefit from European Territorial Policy and, in particular, from the cross-border and trans-national policy. From 2007 onwards, it has been established a new legal framework for the EU-Cohesion Policy, in which the Interregional Cooperation reaches a higher legal level and in which the Spanish bordering areas will keep on benefiting from financial support.