Thanks to the proliferating encounters and exchanges, many local cooperating actors may recognise the complementary advantages of the two neighbouring border areas; and the potential benefits of stronger collaboration, the share of burdens and fruits, and the positive impacts of economies of scale. This second level of cooperation can be defined as functional-territorial, since, unlike the informal level, the actors are working together according to a clear territorially-based agenda along different functional fields. The subject of functions can range from information provision, cultural, or sports activities through joint nature protection, employment services or tourist management to shared transport or health service provision. However, in each above case, sooner or later, the stakeholders will confront serious legal and administrative bottlenecks stemming from different national legislative systems. This crisis arrives as soon as the partners start cooperating in a more integrated manner.