This Decree of the Ministry of Agriculture lays down some amendments to the Decree implementing the Feedstuffs Act. In particular, the present Decree regulates provisions concerning undesirable substances in feed products, originally specified in Art. 4 of the amended Decree. The content of undesirable substances in feed products is considered satisfactory if the analytical result does not exceed the maximum limit specified in the directly applicable European Union legislation, which regulates the undesirable substances.