The new rules are now in effect and there is a transition period to allow aerodromes to convert to the new EASA certificate and to allow the national Authorities to accomplish the conversion of all aerodromes within EASA scope within the transition period. All of the EASA aerodromes must have converted from the aerodrome licence to the aerodrome certificate by the end of the transition period which ends on 31 December 2017. Existing licences will still be valid during the transition period until the new certificate is issued. The EASA requirements and processes should be known in sufficient time to allow aerodromes and the CAA adequate time to plan for the changes before the implementation date. The CAA will work with aerodromes to ensure that all parties understand what is required to transition from the national licence to the EASA certificate, within the transition period.