The provisions of ADR need not to be applied for used articles, machinery or apparatus assigned to UN Nos. 3363, 3537, 3538, 3539, 3540, 3541, 3542, 3543, 3544, 3545, 3546, 3547 or 3548, when carried for repair, inspection, maintenance, disposal or recycling provided that the contents are safely enclosed and measures have been taken to prevent any leakage of contents in normal conditions of carriage.