OBS_VALUE: Slot coordination at Auckland Airport is entrusted to ACL International, an independent slot coordinator. IATA principles are followed, under which exchange of slots between airlines is encouraged. Allocated slots may be freely exchanged on a one-for-one basis…. The Guidelines stipulate that swapping slots between airlines is encouraged, subject to notification of every swap to the coordinator (section 8.11 Slot Mobility between Airlines). In the case of a swap involving newly allocated slots, which are slots other than historic slots or changed historic slots, the coordinator may refuse to confirm the swap if not satisfied that the swap improves the operating position of that airline. Dialogue between the coordinator and the airline is essential in such circumstances.