Agreement between the Russian Federation and Finland on boundary water ecosystems.

Boundary water ecosystems are intended lakes, rivers and streams delimiting the state border (art. 1). The Parties have agreed as follows: (a) to maintain the existing location of water ecosystems, depth and water level of water bodies for ensuring free water drain (art. 2); (b) to keep waterways open for free passage of water, navigation, floating logs and passage of fish (art. 3); (c) to prevent freshwater pollution (art. 4); (d) to ensure conservation and stock enhancement salmon and white-fish by ensuring free passage of the aforesaid fish species along the main waterways (art. 15).