Piggyback transport
6. Where explosives in Division 1.4, 1.5 or 1.6 are carried in a wagon or container, there shall be displayed, in accordance with paragraph 1, danger signs which—
(a)are in the form of the following diagram (the Division number “1.4” and the Compatibility Group letter “E” are only examples);
(b)comply with the measurements in the diagram except that larger measurements, increased proportionally, may be used;
(c)have the Division number appropriate to the explosives being carried written on the upper half;
(d)have the Compatibility Group letter appropriate to the explosives being carried written on the lower half; and
(e)have the class number “1” written in the bottom corner below the Compatibility Group letter.