; and (ii) includes any repeated or regular pattern of use of medically important antimicrobials for purposes other than therapeutic use or nonroutine disease control. (D) The term noncustomary situation does not include normal or standard practice and conditions on the premises that facilitate the transmission of disease. (E) The term nonroutine disease control means the use of antibiotics on an animal that is not sick but where it can be shown that a particular disease or infection is present, or is likely to occur because of a specific, noncustomary situation, on the premises at the barn, house, pen, or other level at which the animal is kept. . 5. Limitations on use of medically important antimicrobials for nonroutine disease control (a) Prohibited acts Section 301 of the Federal Food, Drug, and Cosmetic Act ( 21 U.S.C. 331 ) is amended by adding at the end the following: (ccc) The administration of a medically important antimicrobial to a food-producing animal for nonroutine disease control in violation of the requirements of section 512A. . (b) Requirements Chapter V of the Federal Food, Drug, and Cosmetic Act is amended by inserting after section 512 of such Act ( 21 U.S.C. 360b ) the following: 512A. Limitations on use of medically important antimicrobials for nonroutine disease control (a) Prohibition It shall be unlawful to administer (including by means of animal feed) a medically important antimicrobial to a food-producing animal for nonroutine disease control unless— (1) there is a significant risk that a disease or infection present on the premises will be transmitted to the food-producing animal; (2) the administration of the medically important antimicrobial to the food-producing animal is necessary to prevent or reduce the risk of transmission of the disease or infection described in paragraph (1)