S.C. Code § 39-33-1280
The Commissioner of Agriculture shall establish and promulgate rules and regulations not inconsistent with this article that shall govern the granting of licenses under this article and shall establish and promulgate rules and regulations not inconsistent with this article which shall govern the manner of weighing and testing, including, but not in limitation thereof, the taking of samples, the location where the testing of such samples shall be made and the length of time samples of milk or cream shall be held after testing. The Commissioner of Agriculture shall consult and cooperate with the dairy department of Clemson University in specifying the technical methods and procedure for accurately determining the butterfat content of dairy products.
S.C. Code § 39-33-1280