Division (10) Economic operators may, if they wish, use privately printed subsets combining the appropriate copies, provided that they conform to the official specimen.

Each subset must be designed in such a way that where boxes must contain identical information in the two Member States involved, such information can be entered directly by the exporter or the holder of the transit procedure on copy 1 and will then appear, by means of chemical treatment of the paper, on all the copies. Where, however, for any reason (in particular where the content of the information differs according to the stage of the operation involved) the information is not to be transmitted from one Member State to another, the desensitisation of the self-copying paper must confine reproduction to the copies concerned.