The bottom line is that it is not acceptable to operate without a required license under any circumstances.
About the author: Ken Kirschenbaum, Esq., is a New York-licensed lawyer practicing with Kirschenbaum & Kirschenbaum PC, a Long Island legal firm with a rich history of assisting clients in security and alarm related matters. Ken can be contacted via email at email@example.com. His website, www.kirschenbaumesq.com, features a great supply of legal information and court rulings relevant to the security industry. You can also sign up for Ken's discussion list from his homepage.