At least 85% of the persons, exclusive of racing officials, employed each day in the operation of a track conducting pari-mutuel wagering shall be citizens of the United States of America and residents of the Commonwealth of Pennsylvania for at least 2 years immediately prior to the commencement of their employment at the track and every employe shall be required to execute and submit to the association by which he is employed, a duly verified affidavit setting forth his qualifications pursuant to this section.
58 Pa. Code § 185.27