Md. Code, Agriculture § 4–118

Subject to the exemptions of this subtitle, no person may engage in the business of slaughtering any livestock, or preparing or labeling any livestock carcass, or part of it, for use as human or animal food, or transporting, buying, or selling any dead, dying, disabled, or diseased livestock without obtaining an annual license. The Secretary shall issue the license for an annual license fee of $25.