No visibly diseased or unduly emaciated animal shall be slaughtered in any slaughterhouse where animals are slaughtered, processed, cured, smoked or rendered for human consumption. If the director of the department of health believes an animal to be diseased or unduly emaciated, he may order the animal to be withheld from slaughtering until the licensee submits a written report signed by a licensed veterinarian to the director of the department of health stating that the animal is fit for human consumption. (Mont. Co. Code 1965, § 101-18; 1972 L.M.C., ch. 16, § 13; 1980 L.M.C., ch. 38, § 1.)