A21 Tolerance limits for residues of or contamination by certain (nonmicrobiological) substances

A measure that establishes a maximum residue limit (MRL) or "tolerance limit" of substances such as fertilisers, pesticides, and certains chemicals and metals in food and feed, which are used during their production process but are not their intended ingredients: It includes a permissible maximum level (ML) for non-microbiological contaminants. Measures related to microbiological contaminants are classified under A4 below. 
Example: a) MRL is established for insecticides, pesticides, heavy metals, veterinary drug residues, b) POPs and chemicals generated during processing; c) residues of "dithianon" in apples and hop.