Search Legislation

Commission Implementing Regulation (EU) No 923/2012Show full title

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)

 Help about what version

What Version

 Help about advanced features

Advanced Features

 Help about UK-EU Regulation

Legislation originating from the EU

When the UK left the EU, legislation.gov.uk published EU legislation that had been published by the EU up to IP completion day (31 December 2020 11.00 p.m.). On legislation.gov.uk, these items of legislation are kept up-to-date with any amendments made by the UK since then.

Close

This item of legislation originated from the EU

Legislation.gov.uk publishes the UK version. EUR-Lex publishes the EU version. The EU Exit Web Archive holds a snapshot of EUR-Lex’s version from IP completion day (31 December 2020 11.00 p.m.).

Changes to legislation:

There are currently no known outstanding effects by UK legislation for Commission Implementing Regulation (EU) No 923/2012, Division SERA.8015. Help about Changes to Legislation

Close

Changes to Legislation

Revised legislation carried on this site may not be fully up to date. At the current time any known changes or effects made by subsequent legislation have been applied to the text of the legislation you are viewing by the editorial team. Please see ‘Frequently Asked Questions’ for details regarding the timescales for which new effects are identified and recorded on this site.

SERA.8015Air traffic control clearancesU.K.

[F1(a) Air traffic control clearances shall be based solely on the following requirements for providing air traffic control service: U.K.
(1)

Clearances shall be issued solely for expediting and separating air traffic and be based on known traffic conditions which affect safety in aircraft operation. Such traffic conditions include not only aircraft in the air and on the manoeuvring area over which control is being exercised, but also any vehicular traffic or other obstructions not permanently installed on the manoeuvring area in use.

(2)

ATC units shall issue such ATC clearances as necessary to prevent collisions and to expedite and maintain an orderly flow of air traffic.

(3)

ATC clearances shall be issued early enough to ensure that they are transmitted to the aircraft in sufficient time for it to comply with them.]

(b)Operation subject to clearanceU.K.
(1)An air traffic control clearance shall be obtained prior to operating a controlled flight, or a portion of a flight as a controlled flight. Such clearance shall be requested through the submission of a flight plan to an air traffic control unit.U.K.
(2)The pilot-in-command of an aircraft shall inform ATC if an air traffic control clearance is not satisfactory. In such cases, ATC will issue an amended clearance, if practicable.U.K.
(3)Whenever an aircraft has requested a clearance involving priority, a report explaining the necessity for such priority shall be submitted, if requested by the appropriate air traffic control unit.U.K.
(4)Potential reclearance in flight. If, prior to departure, it is anticipated that, depending on fuel endurance and subject to reclearance in flight, a decision may be taken to proceed to a revised destination aerodrome, the appropriate air traffic control units shall be so notified by the insertion in the flight plan of information concerning the revised route (where known) and the revised destination.U.K.
(5)An aircraft operated on a controlled aerodrome shall not taxi on the manoeuvring area without clearance from the aerodrome control tower and shall comply with any instructions given by that unit.U.K.
(c)Clearances for transonic flightU.K.
(1)The air traffic control clearance relating to the transonic acceleration phase of a supersonic flight shall extend at least to the end of that phase.U.K.
(2)The air traffic control clearance relating to the deceleration and descent of an aircraft from supersonic cruise to subsonic flight shall seek to provide for uninterrupted descent at least during the transonic phase.U.K.
(d)Contents of clearancesU.K.

An air traffic control clearance shall indicate:

(1)

aircraft identification as shown in the flight plan;

(2)

clearance limit;

(3)

[F1route of flight, …

(i)

the route of flight shall be detailed in each clearance when deemed necessary; and

(ii)

the phrase ‘ cleared via flight planned route ’ shall not be used when granting a re-clearance;]

(4)

level(s) of flight for the entire route or part thereof and changes of levels if required;

(5)

any necessary instructions or information on other matters such as approach or departure manoeuvres, communications and the time of expiry of the clearance.

(e)Read-back of clearances and safety-related informationU.K.
(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:U.K.
(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.

(2)Other clearances or instructions, including conditional clearances and taxi instructions, shall be read back or acknowledged in a manner to clearly indicate that they have been understood and will be complied with.U.K.
(3)The controller shall listen to the read-back to ascertain that the clearance or instruction has been correctly acknowledged by the flight crew and shall take immediate action to correct any discrepancies revealed by the read-back.U.K.
(4)Voice read-back of CPDLC messages shall not be required, unless otherwise specified by the ANSP.U.K.
[F2(ea) Changes in clearance regarding route or level U.K.
(1)

When issuing a clearance covering a requested change in route or level, the exact nature of the change shall be included in the clearance.

(2)

When traffic conditions will not permit clearance of a requested change, the word ‘ UNABLE ’ shall be used. When warranted by circumstances, an alternative route or level shall be offered.

(eb) Clearance related to altimetry U.K.
(1)

For flights in areas where a transition altitude is established, the vertical position of the aircraft shall, except as provided for in (5) below, be expressed in terms of altitudes at or below the transition altitude and in terms of flight levels at or above the transition level. While passing through the transition layer, the vertical position shall be expressed in terms of flight levels when climbing and in terms of altitudes when descending.

(2)

The flight crew shall be provided with the transition level in due time prior to reaching it during descent.

(3)

[F3Except when it is known that the aircraft has already received the information in a directed transmission, a QNH altimeter setting shall be included in:

(i)

the descent clearance, when first cleared to an altitude below the transition level;

(ii)

the approach clearance or the clearance to enter the traffic circuit;

(iii)

the taxi clearance for departing aircraft.]

(4)

A QFE altimeter setting shall be provided to aircraft on request or on a regular basis in accordance with local arrangements.

(5)

When an aircraft which has been given clearance to land is completing its approach using atmospheric pressure at aerodrome elevation (QFE), the vertical position of the aircraft shall be expressed in terms of height above aerodrome elevation during that portion of its flight for which QFE may be used, except that it shall be expressed in terms of height above runway threshold elevation:

(i)

for instrument runways if the threshold is 2 m (7 ft) or more below the aerodrome elevation; and

(ii)

for precision approach runways.

Textual Amendments

F3Words in Annex Section 8 SERA.8015 point (eb)(3) substituted (23.3.2023) by The Aviation Safety and Air Traffic Management (Amendment) Regulations 2022 (S.I. 2022/1235), regs. 1(3), 5(3)

(ec) Conditional clearances U.K.

Conditional phrases, such as ‘ behind landing aircraft ’ or ‘ after departing aircraft ’ , shall not be used for movements affecting the active runway(s), except when the aircraft or vehicles concerned are seen by the appropriate controller and pilot. The aircraft or vehicle causing the condition in the clearance issued shall be the first aircraft/vehicle to pass in front of the other aircraft concerned. In all cases, a conditional clearance shall be given in the following order and consist of:

(1)

the call sign;

(2)

the condition;

(3)

the clearance; and

(4)

a brief reiteration of the condition.]

(f)Coordination of clearancesU.K.
(1)An air traffic control clearance shall be coordinated between air traffic control units to cover the entire route of an aircraft or a specified portion thereof as described in provisions (2) to (6).U.K.
(2)An aircraft shall be cleared for the entire route to the aerodrome of first intended landing:U.K.
(i)

when it has been possible, prior to departure, to coordinate the clearance between all the units under whose control the aircraft will come; or

(ii)

when there is reasonable assurance that prior coordination will be effected between those units under whose control the aircraft will subsequently come.

(3)When coordination as in (2) has not been achieved or is not anticipated, the aircraft shall be cleared only to that point where coordination is reasonably assured; prior to reaching such point, or at such point, the aircraft shall receive further clearance, holding instructions being issued as appropriate.U.K.
(4)When prescribed by the ATS unit, aircraft shall contact a downstream air traffic control unit, for the purpose of receiving a downstream clearance prior to the transfer of control point.U.K.
(i)

Aircraft shall maintain the necessary two-way communication with the current air traffic control unit whilst obtaining a downstream clearance.

(ii)

A clearance issued as a downstream clearance shall be clearly identifiable as such to the pilot.

(iii)

Unless coordinated, downstream clearances shall not affect the aircraft’s original flight profile in any airspace, other than that of the air traffic control unit responsible for the delivery of the downstream clearance.

(5)When an aircraft intends to depart from an aerodrome within a control area to enter another control area within a period of thirty minutes, or such other specific period of time as has been agreed between the area control centres concerned, coordination with the subsequent area control centre shall be effected prior to issuance of the departure clearance.U.K.
(6)When an aircraft intends to leave a control area for flight outside controlled airspace, and will subsequently re-enter the same or another control area, a clearance from the point of departure to the aerodrome of first intended landing may be issued. Such clearance or revisions thereto shall apply only to those portions of the flight conducted within controlled airspace.U.K.

Back to top

Options/Help

Print Options

You have chosen to open the Whole Regulation

The Whole Regulation you have selected contains over 200 provisions and might take some time to download. You may also experience some issues with your browser, such as an alert box that a script is taking a long time to run.

Would you like to continue?

You have chosen to open Schedules only

The Schedules you have selected contains over 200 provisions and might take some time to download. You may also experience some issues with your browser, such as an alert box that a script is taking a long time to run.

Would you like to continue?

Close

Legislation is available in different versions:

Latest Available (revised):The latest available updated version of the legislation incorporating changes made by subsequent legislation and applied by our editorial team. Changes we have not yet applied to the text, can be found in the ‘Changes to Legislation’ area.

Original (As adopted by EU): The original version of the legislation as it stood when it was first adopted in the EU. No changes have been applied to the text.

Close

See additional information alongside the content

Geographical Extent: Indicates the geographical area that this provision applies to. For further information see ‘Frequently Asked Questions’.

Show Timeline of Changes: See how this legislation has or could change over time. Turning this feature on will show extra navigation options to go to these specific points in time. Return to the latest available version by using the controls above in the What Version box.

Close

Opening Options

Different options to open legislation in order to view more content on screen at once

Close

More Resources

Access essential accompanying documents and information for this legislation item from this tab. Dependent on the legislation item being viewed this may include:

  • the original print PDF of the as adopted version that was used for the EU Official Journal
  • lists of changes made by and/or affecting this legislation item
  • all formats of all associated documents
  • correction slips
  • links to related legislation and further information resources
Close

Timeline of Changes

This timeline shows the different versions taken from EUR-Lex before exit day and during the implementation period as well as any subsequent versions created after the implementation period as a result of changes made by UK legislation.

The dates for the EU versions are taken from the document dates on EUR-Lex and may not always coincide with when the changes came into force for the document.

For any versions created after the implementation period as a result of changes made by UK legislation the date will coincide with the earliest date on which the change (e.g an insertion, a repeal or a substitution) that was applied came into force. For further information see our guide to revised legislation on Understanding Legislation.

Close

More Resources

Use this menu to access essential accompanying documents and information for this legislation item. Dependent on the legislation item being viewed this may include:

  • the original print PDF of the as adopted version that was used for the print copy
  • correction slips

Click 'View More' or select 'More Resources' tab for additional information including:

  • lists of changes made by and/or affecting this legislation item
  • confers power and blanket amendment details
  • all formats of all associated documents
  • links to related legislation and further information resources