# Commission Implementing Regulation (EU) No 923/2012 of 26 September 2012 laying down the common rules of the air and operational provisions regarding services and procedures in air navigation and amending Implementing Regulation (EU) No 1035/2011 and Regulations (EC) No 1265/2007, (EC) No 1794/2006, (EC) No 730/2006, (EC) No 1033/2006 and (EU) No 255/2010 (Text with EEA relevance), Division SERA.14087: Use of relay communication technique

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

(a) When an ATS unit has been unable to establish contact with an aircraft after calls on the frequencies on which the aircraft is believed to be listening, it shall:
(1) request other ATS units to render assistance by calling the aircraft and relaying traffic, if necessary; and
(2) request aircraft on the route to attempt to establish communication with the aircraft and relay traffic, if necessary.
(b) The provisions of point (a) shall also be applied:
(1) at request of the ATS unit concerned;
(2) when an expected communication from an aircraft has not been received within a time period such that the occurrence of a communication failure is suspected.

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Source: https://www.legislation.gov.uk/eur/2012/923/annex/section/14/division/SERA.14087 (the official version)
Page: https://openlegislation.uk/eu-regulation-2012-923/annex/section-14/division-SERA.14087
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.