58 Pa. Code § 185.24
Minors under 21 years of age shall not be admitted to the track. Any minor legally employed by any association, concessionaire or other person duly licensed by the Commission shall be admitted to the track for the sole purpose of performing his duties as an employe. A minor, accompanying a parent or natural guardian who is also a licensee and whose employment requires him to be present in the stable or paddock area, shall be admitted to the stable or paddock area with such licensee. In no event shall such minor be permitted to wager upon any race nor shall such miner be permitted to be in the area of the track other than that area in which his duties are to be performed. All associations licensed by the Commission shall be responsible for establishing the administrative and security procedures necessary to enforce the provisions of this subchapter at the tracks operated by them. Every licensee employing any minor shall be required to establish procedures necessary to assure compliance with the provisions of this subchapter by any minor employed by such licensee.
58 Pa. Code § 185.24