Interstate agreements on social security (Slovenia – Bosnia and Herzegovina – Croatia – Macedonia – Serbia)
The Danube River Network of Protected Areas (Slovakia – Austria – Bulgaria – Croatia – Germany – Hungary – Romania – Hungary – Serbia – Ukraine)
Carpathian wetlands Initiative to ensure and support the effective conservation and wise use of wetlands in the Carpathian region (Slovakia – Czech Republic – Hungary – Poland – Romania – Serbia – Ukraine)
Crisis and disaster/emergency management cooperation agreements (Croatia, Slovenia, Bosnia & Herzegovina, Montenegro, Hungary and Serbia)