Explain how to insure that a small business does not sell alcohol to anyone under the age of 21. The law states: A person must be 21 years of age or older to legally purchase or consume any alcoholic beverage on a licensed premise. There is absolutely no exception to this. (N.J.S.A. 9:17B-1.) Please write the policy for a pizza restaurant (or small business ) to comply with the New Jersey law.