S.C. Code § 39-33-1720
It shall be unlawful for any person knowingly to sell, expose for sale or deliver for domestic use or to be converted into any product of human food whatsoever any (a) unclean, impure, unwholesome, adulterated or skimmed milk, (b) milk from which has been held back what is known as strippings or (c) milk taken from an animal having disease, sickness, ulcers or abscesses. But this section shall not prohibit the sale of buttermilk or of skimmed milk when sold as such.
For the purposes of this section, milk which is proven by any reliable test or analysis to contain less than three per cent of butterfat and eight and one-half per cent solids other than butterfat shall be regarded as "skimmed milk." The Commissioner of Agriculture and all inspectors and chemists employed under Chapter 27 of Title 46 shall be charged with the enforcement of this section.
S.C. Code § 39-33-1720