# Commission Regulation (EC) No 1032/2006 of 6 July 2006 laying down requirements for automatic systems for the exchange of flight data for the purpose of notification, coordination and transfer of flights between air traffic control units (Text with EEA relevance), Division 7.2.1: A crossing cancellation process shall be initiated by the unit responsible for the flight when one of the following occurs:

Extent: E+W+S+N.I.

the flight previously notified by a basic flight data process will now not enter the airspace of the notified unit or is no longer of interest to the notified unit,
the crossing will not be executed on the route expressed in the crossing notification information,
the crossing will not be executed according to the conditions under negotiation or according to the conditions agreed after an airspace crossing dialogue.

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Source: https://www.legislation.gov.uk/eur/2006/1032/annex/I/part/C/division/7/division/7.2/division/7.2.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2006-1032/annex-I/part-C/division-7/division-7.2/division-7.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.