28.—(1) In this Order “traffic sign” means any object or device (whether fixed or portable or attached to a vehicle) for conveying to traffic on roads warnings, information, requirements, restrictions or prohibitions of any description prescribed or authorised by the Department and any line or mark on a road for so conveying such warnings, information, requirements, restrictions or prohibitions.
(2) Traffic signs shall be of the prescribed size, colour and type except where the Department authorises the erection or retention of a sign of another character; and for the purposes of this paragraph, illumination, whether by lighting or by the use of reflectors or reflecting material, or the absence of such illumination, shall be part of the type or character of a sign.
(3) Regulations may require equipment used in connection with traffic signs to be of a type approved by the Department.
(4) Regulations or any authorisation under paragraph (2) may provide that Article 50 of the Order of 1995 shall apply to signs of a type specified in that behalf by the regulations or, as the case may be, to the sign to which the authorisation relates.
(5) Regulations may provide for this Part to apply to traffic mirrors as it applies to traffic signs, subject to such modifications as the Department considers necessary or expedient.