Regulation No. 19 of the Ministry of Environment that sets the categories of waste and waste catalogue.

The waste is divided into following categories: a) the hazardous waste, marked with the letter N; b) the separate waste, marked with the letter Z; c) other waste, marked with the letter O. The waste contained at the Waste Catalogue arranged according to its origin and management conditions and the hazardous waste also according to their qualities or its pollutant content, respectively, that determine or may implicate its hazard. The waste is classified according to the Waste Catalogue given in the Annex No. 1. The qualities of waste causing its hazardousness are given in the Annex No. 2 of the Regulation. The list of pollutants is given in the Annex No. 3.