410 ILCS 620/2.25
"New animal drug" means any drug intended for use for animals other than man, including any drug intended for use in animal feed but not including such animal feed (1) the composition of which is such that such drug is not generally recognized, among experts qualified by scientific training and experience to evaluate the safety and effectiveness of animal drugs, as safe and effective for use under the condition prescribed, recommended or suggested in the labeling thereof; except that such a drug not so recognized shall not be deemed to be a "new animal drug" if at any time prior to June 25, 1938, it was subject to the Food and Drug Act of June 30, 1906, as amended, and if at such time its labeling contained the same representations concerning the conditions of its use; or (2) the composition of which is such that such drug, as a result of investigations to determine its safety and effectiveness for use under such conditions, has become so recognized but which has not, other than in such investigations, been used to a material extent or for a material time under such conditions; or (3) which drug is composed wholly or partly of any kind of penicillin, streptomycin, chlortetracycline, chloramphenicol or bacitracin, or any derivative thereof, except when there is in effect a published order of the Secretary of Health and Human Services declaring such drug not to be a new animal drug on the grounds that the requirement of certification of batches of such drug, as provided for in Section 512(n) of the Federal Act, is not necessary to insure that the objectives specified in paragraph (3) thereof are achieved and that neither paragraph (1) nor (2) above applies to such drug.
410 ILCS 620/2.25