ADR 0516 §4: each is kept as a reading lesson, as a change of mark or mail group is, so later batches with a mail of that sender follow it; an item number the entry does not hold is refused.
ADR 0516 §4: each is kept as a reading lesson, as a change of mark or mail group is, so later batches with a mail of that sender follow it; an item number the entry does not hold is refused.