81.—(1) This Order shall not prohibit the sale without a licence of intoxicating liquor to passengers in a seagoing vessel, an aircraft or a railway passenger vehicle for consumption on board the vessel, aircraft or vehicle, if the following conditions are observed.
(2) The conditions mentioned in paragraph (1) are—
(a)that the vessel, aircraft or vehicle is of a kind employed for the carriage of passengers;
(b)in the case of a vessel, that the vessel is one which plies between a place in Northern Ireland and a place in a country other than Northern Ireland and that the liquor is sold only—
(i)during the period commencing 1 and a half hours before the time fixed for departure and ending at the time of departure; and
(ii)while the vessel is being navigated;
(c)in the case of an aircraft, that the liquor is sold only while the aircraft is in flight;
(d)in the case of a railway passenger vehicle, that the vehicle is one in which passengers can be supplied with food and the liquor is served in the course of a railway journey on which fare paying passengers are carried by a railway undertaking.