No meat or meat products shall be offered for sale, displayed, sold or kept in any food establishment unless such products have first been inspected and approved by either an authorized agent of the Bureau of Animal Industry, United States Department of Agriculture, or the Bureau of Animal Industry, Pennsylvania Department of Agriculture. The Board may, in its discretion, permit the sale of meat or meat products which have been inspected and approved by a duly authorized agent who is a qualified and licensed veterinarian appointed under an ordinance of a municipality of the commonwealth, provided that the procedure followed in conducting inspections, including the facilities for making the same, the requirements with respect to the sanitation of the establishment and the marking, branding or identifying of meat or meat products, shall conform with the regulations of the United States Department of Agriculture or the Pennsylvania Department of Agriculture.