243.—(1) In aircraft to which this paragraph applies, notices indicating when smoking is prohibited must be exhibited so as to be visible from each passenger seat.
(2) Paragraph (1) applies to any aircraft registered in the United Kingdom, other than a Part-CAT aircraft.
(3) A person must not smoke in any compartment of an aircraft registered in the United Kingdom at a time when smoking is prohibited in that compartment by a notice to that effect exhibited by or on behalf of the pilot in command of the aircraft.