a. Tolerance Limits for Residues of or Contamination by Certain (Non-Microbiological) Substances
A measure that establishes a maximum residue limit (MRL) or "tolerance limit" of substances 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 contaminants.
b. Restricted Use of Certain Substances in Foods and Feeds and Their Contact Materials
Restriction or prohibition on the use of certain substances in food and feed, which are part of their ingredients.