The OECD’s Private Sector Participation in Water Infrastructure: Checklist for Public Action could be useful in this regard. Tvo administrative river basin management units were designated in 2003: the Danube River Basin District, which included sub-basins of the Mura, Drava and Sava Rivers, and the Adriatic River Basin District, which included the basins of the Soca River and all rivers along the Adriatic coast. To facilitate management, every sub-basin is divided into smaller units called “water bodies” (155 surface water and 21 groundwater bodies).