(ii) As used in this subdivision, the term "establishment" includes a factory, mercantile establishment, business office, restaurant, hotel, and any other trade, business or service. 2. The employer of any person claiming to be between eighteen and twenty-five years of age who does not present an employment certificate duly issued for him or her must require from such person, and furnish upon demand to the commissioner or his or her authorized representative, proof of the age of such person in the form of a driver's license or other documentation issued by the government of the United States or of any state located therein, or a certificate of age issued to such person by an employment certificating official. Such proof of age or a legible photocopy thereof, or an employment certificate, previously issued for such person and on file in the place of his or her employment, shall be conclusive evidence that the person has reached the age certified to therein.