# 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 (1): The flight crew shall read back to the air traffic controller safety-related parts of ATC clearances and instructions which are transmitted by voice. The following items shall always be read back:

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

(i)ATC route clearances;
(ii)clearances and instructions to enter, land on, take off from, hold short of, cross, taxi and backtrack on any runway; and
(iii)runway-in-use, altimeter settings, SSR codes, newly assigned communication channels, level instructions, heading and speed instructions; and
(iv)transition levels, whether issued by the controller or contained in ATIS broadcasts.

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Source: https://www.legislation.gov.uk/eur/2012/923/annex/section/8/division/SERA.8015/division/e/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2012-923/annex/section-8/division-SERA.8015/division-e/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.