204 CMR 19.00:
(1) Passengers shall be checked for proof of proper age and signs of intoxication before being served alcoholic beverages.
(2) Passengers shall not be allowed to consume alcoholic beverages aboard ship other than those sold by the licensee.
(3) Passengers shall not be allowed to bring alcoholic beverages on or off a ship except for such beverages as they are transporting as personal baggage in unopened containers from one port to another port. Such containers shall not be opened while at sea. The amount of alcoholic beverages so transported by any person shall not exceed the amounts authorized in M.G.L. c. 138, s. 22.