Division (4) A colour marking of the different copies shall be effected in the following manner on forms conforming to the specimens shown in Titles III and IV of this Annex:
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copies 1, 2, 3 and 5 shall have at the right hand edge a continuous margin, coloured respectively red, green, yellow and blue,
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copies 4, 6, 7 and 8 shall have at the right hand edge a broken margin coloured respectively blue, red, green and yellow;