According to NBAA, the FAA will publish a notice to airmen on December 12 detailing plans for the rollout of Phase 2 of the North Atlantic datalink mandate. Implementation will begin with Phase 2a on Feb. 5, 2015, at which time flights within the North Atlantic Tracks (NAT) between FL350 and FL390 must be equipped with Fans 1/A controller-pilot datalink communications and ADS-C systems. The program expands to these altitudes in the entire ICAO NAT region on Dec. 7, 2017, and to all flights in this region above FL290 on Jan. 30, 2020.