2. In these Regulations–
(a)“patrol sign” means a sign exhibited by a school crossing patrol for the purpose of stopping a vehicle in accordance with section 28(1) of the Road Traffic Regulation Act 1984;
(b)“perimeter strip” has the meaning given by regulation 3(3);
(c)“the pole” means the pole comprised in a patrol sign;
(d)“retroreflecting material” means material which reflects a ray of light back towards the source of that light; and
(e)“the roundel” means the roundel comprised in a patrol sign.