4. A measure shall be imposed in the appropriate amounts in each case, on a non-discriminatory basis, on air services supplied by all non-Community air carriers found to benefit from subsidies or engaged in unfair pricing practices on the respective routes, except for air services supplied by those non-Community air carriers for which undertakings under the terms of this Regulation have been accepted.

4. A measure shall be imposed in the appropriate amounts in each case, on a non-discriminatory basis, on air services supplied by all non-Community air carriers found to benefit from subsidies or engaged in unfair pricing practices on the respective routes, except for air services supplied by those non-Community air carriers for which undertakings under the terms of this Regulation have been accepted.

(1) The competitive position of Community air carriers when providing air services to, via or from the Community could be adversely affected by unfair and discriminatory practices of non-Community air carriers providing like air services.

In order to ensure that the Single European Sky is an airspace without frontiers, the Commission proposes in the regulation on the organisation and management of airspace to set up a unique flight information region by merging all the national regions into a single portion of airspace within which air traffic services will be provided according to the same rules and procedures.

(ii) an air service which is jointly operated under Article 3 is not exposed to effective competition by direct or indirect air transport services between the two airports connected or between nearby airports, or by other modes of transport which offer speed, convenience and prices comparable to air transport between the cities served by the two airports connected.

1. Notwithstanding Article 3, a Member State may, where one of the air carriers licensed by it has started to operate a scheduled passenger air service with aircraft of no more than 80 seats on a new route between regional airports where the capacity does not exceed 30 000 seats per year, refuse a scheduled air service by another air carrier for a period of two years, unless it is operated with aircraft of not more than 80 seats, or it is operated in such a way that not more than 80 seats are available for sale between the two airports in question on each flight.