Maryland Code, Agriculture § 4-119

(1) Custom slaughterer, custom processor, meat broker, renderer, or animal food manufacturer;

(2) Wholesaler of any livestock carcass, or part or product of it;

(3) Public warehouseman storing any livestock carcass, or part or product of it;

(4) Buyer, seller, or transporter of any dead, dying, disabled, or diseased livestock or any part of any carcass of livestock that died otherwise than by slaughter.