Paragraph 4
The nationality and registration marks shall also be inscribed, together with the name and address of the registered owner of the aircraft, on a fireproof metal plate affixed in a prominent position—
(a)
in the case of an aeroplane having an empty weight not exceeding 150 kg either in accordance with paragraph (c) or on the wing;
(b)
in the case of a balloon, on the basket or envelope; or
(c)
in the case of any other aircraft on the fuselage or car, as the case may be.