58 Pa. Code § 185.140
The association shall supervise the practice and methods of so-called merchandise peddlers who may have entry to the track enclosure to solicit among the employes and other licensees engaged at the track, provided, however, that the association shall not, by virtue of this section or otherwise, restrict purchasing or attempt to control or monopolize the proper selling of merchandise to owners, trainers or stable employes. Each so-called merchandise peddler shall be licensed by the Commission. Each licensed peddler shall submit a list of his wares to the presiding judge. A licensed peddler dealing with medicines for horses shall also submit a list of medicines or preparations he intends to sell to the Commission veterinarian for his approval. No sale may be made of any medicine, preparation or other wares prior to approval. No merchandise peddler shall be permitted access to the stable area within three hours of post time.
58 Pa. Code § 185.140