§ 249. Pari-mutuel employees to be citizens and residents. At least eighty-five per centum of the persons employed each day by a racing corporation conducting a race meeting, to operate or assist in the operation of its pari-mutuel system of betting shall be citizens of the United States and residents of the state of New York for at least two years preceding the date of their employment. Each person, prior to his employment by a racing corporation, shall be required to execute and submit to such racing corporation a duly verified affidavit setting forth his qualifications for employment pursuant to the provisions of this section.