12. The requirements of paragraph 2.1.3.2 of Annex II to Council Directive 71/320/EEC do not apply if wheel chocks are provided with the AILV or AILV-combination and the wheel chocks are—
(a)suitable and sufficient;
(b)readily accessible; and
(c)capable, when used in conjunction with any parking brakes fitted to the vehicle, of holding the vehicle stationary when loaded to its maximum mass on a gradient of 12%.