Under what condition can Tour or Cruise Vessel licenses serve liquor?

The correct answer indicates that Tour or Cruise Vessel licenses allow the serving of liquor off port only, meaning that these vessels can serve alcoholic beverages while they are not docked at the harbor. This regulation is designed to regulate the consumption of alcohol in a manner that corresponds with the specific type of service provided by these vessels.

When in operation off port, vessels can create a unique experience for their passengers, providing them with the opportunity to enjoy beverages while exploring maritime environments. This aligns with licensing rules intended to foster public safety and responsible consumption of alcohol while passengers are in transit.

Each of the incorrect options reflects a scenario that does not align with the regulatory framework for Tour or Cruise Vessel licenses. Serving liquor only in port or while docked would be limiting the operation of the vessel and restricting the overall cruising experience that such licenses are meant to enhance. The provision of liquor service at any location would also contradict the stipulations typically placed on these licenses, which are designed to maintain order and compliance with local and maritime alcohol laws.