37A. Use of State Marks- (1) An aircraft shall not bear on any part of its exterior surface any advertisement or any sign or lettering except those under these rules and as required or permitted by the Director-General.

(2) The name of an aircraft and the name and emblems of the owner of the aircraft may be displayed on the aircraft if the location, size, shape and colour of the lettering and signs do not interfere with easy recognition of, and are not capable of confusion with, the nationality and registration marks of the aircraft.

(3) An aircraft other than a State aircraft shall not bear any mark or sign prescribed for use by a State aircraft.

(4) National flags or colours may be displayed on the aircraft in such a manner that they are distinct and are not likely to create confusion with the markings used by military aircraft.