Section 3 establishes that a buyer is not required to pay for livestock or livestock products that are or have been contaminated. For the purpose of the present Regulation contaminated means containing or having been treated with: a) a substance not permitted by, or in an amount in excess of limits prescribed, inter alia, under the Food and Drugs Act (Canada); b) an ingredient, a food additive or any source of ionizing radiation not permitted by, or in an amount in excess of limits prescribed un