FAQs Airspace Usage requirements – DLS/CPDLC (controller-pilot data link communication)Airspace Usage requirementsRegulations PDF Who should I ask if I have further questions on CPDLC equipage exemption? Answer For any further information on CPDLC exemption please send your request to atm [at] easa.europa.eu. Last updated 11/06/2020 Was this helpful? Yes No