Final answer:
It is true that only the licensee's employees can sell or serve alcohol at a catered event, in accordance with regulation and responsible service laws.
Step-by-step explanation:
It is true that at a catered event where alcohol is served, the licensee's employees are the only ones legally permitted to sell or serve alcohol. This stipulation is part of the regulations designed to ensure responsible alcohol service and compliance with local and state alcohol laws. Individuals who serve alcohol at such events are often required to have training in responsible alcohol service to prevent sales to minors and intoxication.