Paragraph 15 I1

a sign that indicates which of Categories 1, 2 or 3 the AILV or AILV-combination falls into; or

a sign that is approved in connection with vehicles carrying loads of exceptional dimensions by the appropriate authority in another EEA State or in any other country which is a member of the United Nations Economic Commission for Europe.

be mounted in a clearly visible position on the front of the vehicle (or, in the case of an AILV-combination, on the front of the foremost motor vehicle);

face forwards;

be as near to the vertical plane as possible;

be kept clean and unobscured at all times; and

except as stated in sub-paragraph (3), consist of white letters on a black background in the following format (specifying Category 1, 2 or 3, as appropriate to the vehicle in question)—