The Road Traffic (Carriage of Explosives) Regulations (Northern Ireland) 1993

5.  In the case of explosives in Division 1.1, 1.2 or 1.3 each placard referred to in paragraph 1(b) shall—

(a)be in the form of the following diagram (the Division number “1.2” and the Compatibility Group letter “E” are only examples);

(b)comply with the measurements in the diagram except that larger measurements may be used in which case the measurements shall be increased proportionally;

(c)have a pictograph of a bomb blast filling most of its upper half;

(d)have the Division number and Compatibility Group letter appropriate to the explosives being carried written in its lower half; and

(e)have the class number “1” written in its bottom corner below the Division number and Compatibility Group letter.