This Decree of the Ministry of Environment is composed of four articles and two Annexes. The following types of water flows are recognized as significant: water flows determining State borders; water flows which are used or may be used as water supply resources; navigable water flows; water flows significantly supplying industry and agriculture; water flows used for purposes such as hydropower generation or aquaculture. Annex 1 specifies the index of significant water flows. Annex 2 contains the