8.—(1) So far as reasonably practicable—
(a)a barrier shall be constructed so as to be strong enough to withstand distortion or fracture, and
(b)a skirt fitted to a barrier shall be capable of withstanding damage, caused by wind pressure or by a farm animal.
(2) Subject to sub-paragraph (1) above, a barrier (with a skirt, if fitted) shall be as light in weight as possible.