; and (3) by adding at the end the following: (l) Zootechnical animal food substances The labeling of a zootechnical animal food substance— (1) shall include the statement: Not for use in the diagnosis, cure, mitigation, treatment, or prevention of disease in animals. ; and (2) may include statements regarding the intended effect of the substance on the structure or function of the body of animals, as set forth in section 201(tt)(1). . (c) Misbranded food Section 403 of the Federal Food, Drug, and Cosmetic Act ( 21 U.S.C. 343 ) is amended by adding at the end the following: (z) If it is a zootechnical animal food substance and the labeling of the food does not include the statement required by section 409(l)(1). . (d) Rule of construction Nothing in this section, or the amendments made by this section, shall be construed to authorize the Secretary of Health and Human Services to require the use of any zootechnical food substance or food additive (as those terms are defined in section 201 of the Federal Food, Drug, and Cosmetic Act, as amended by subsection (a)).