1. The hazard warning sign to be used on a label shall be that shown in column 3 of Part I of this Schedule for the classification of the substance shown in the corresponding entry in column 2 of that Part and the signs shall conform in form and colour to those shown in the said column 3, except that—
(a)in the case of the signs for the classifications “non-flammable compressed gas”, “flammable gas”, “flammable liquid” and “substance which in contact with water emits flammable gas”, the symbol and the lettering may be in white;
(b)in the case of the sign for the classification “spontaneously combustible substance”, the lettering may be in white;
(c)in place of the word “toxic”, the word “poison” may be used wherever it occurs;
(d)in place of the word “flammable”, the word “inflammable” may be used wherever it occurs; and
(e)the sign may show the class number in accordance with the International Maritime Dangerous Goods Code issued by the International Maritime Organisation or the Technical Instructions for the Safe Transport of Dangerous Goods by Air issued by the International Civil Aviation Organisation.
2. The words shown within the hazard warning sign may be omitted, but in such a case those words shall be shown on the package or label adjacent to the sign.
3. Each hazard warning sign shall be in the form of a square set with its sides at an angle of 45° to the vertical.
4. Hazard warning signs shall have a line of the same colour as the symbol, 5 millimetres inside the edge and running parallel to it. (The broken line which surrounds each sign delineates the edge of that sign and need not be shown.)