on a permanent basis where duly justified by the type of traffic or where the use of electronic data-processing techniques is not appropriate for the customs formalities concerned;
ar bhonn buan i gcás ina mbeidh bonn cirt leo de bharr chineál an tráchta nó i gcás nach iomchuí úsáid a bhaint as teicnící próiseála sonraí leictreonacha i gcomhar na bhfoirmiúlachtaí custaim lena mbaineann;