53.—(1) A captive balloon flying by day at a height exceeding 60 metres above the surface shall have attached to its mooring cable tubular streamers which are—
(a)not less than 40 centimetres in diameter and 2 metres in length; and
(b)marked with alternate bands of red and white 50 centimetres wide at intervals of not more than 200 metres measured from the basket or, if there is no basket, from the lowest part of the balloon.
(2) A kite flying by day at a height exceeding 60 metres above the surface shall have attached to its mooring cable either:
(a)tubular streamers as specified in paragraph (1); or
(b)at intervals of not more than 100 metres measured from the lowest part of the kite, streamers not less than 80 centimetres long and 30 centimetres wide at their widest point, marked with alternate bands of red and white 10 centimetres wide.