Nothing in this article shall prohibit possession of alcoholic
beverages by any such person while actually engaged in the performance
of employment by a person who is licensed under Title 33 of the Revised
Statutes, or while actively engaged in the preparation of food while
enrolled in a culinary arts or hotel management program at a county
vocational school or post-secondary educational institution; however,
nothing in this article shall be construed to preclude the imposition
of a penalty under this article, N.J.S.A. 33:1-81, or any other section
of law against a person who is convicted of unlawful alcoholic beverage
activity on or at premises licensed for the sale of alcoholic beverages.