S.C. Code Ann. § 46-27-210

Each manufacturer, importer, jobber, agent or seller before selling or offering or exposing for sale in this State any commercial feed shall, for each and every feed bearing a distinct name or trademark, file for registration with the Commissioner a copy of the statement required in Section 46-27-310 and accompany the statement, on request, by a sealed container of at least one pound of the commercial feed. The sample shall correspond within reasonable limits to the feed which it represents in the percentages of crude protein, crude fat and crude fiber which it contains.