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been completed.

Chapter 14:   Aeronautical Communications

Section 14.1:   General

14.1.1              Acknowledging Receipt of Verbal Coordination

14.1.1.1         When an ATS unit receives a verbal clearance or instruction from another ATS unit that includes any of the following, it must read back:

(a)         any ATS route number or name;

(b)         any tracking point;

(c)          assigned level;

(d)         any SID;

(e)         any STAR identifier, including any runway specified;

(f)            assigned SSR code;

(g)         an assigned Mach No.;

(h)         any heading, including direction of turn;

(i)            any item notified in the clearance as "AMENDED" or "RECLEARED";

(j)            cancellation of a clearance;

(k)          a level requirement/restriction;

(l)            any clearance limit imposed;

(m)       the word "VISUAL" when appended to level, heading, or turn instructions.

14.1.1.2         When an ATS unit receives a position report, a level check or a change of level from another ATS unit, the acknowledgment must include:

(a)         the aircraft callsign;

(b)         the advised level.

14.1.1.3         The originating unit must obtain a correct readback. Under no circumstances must receipt of a message be acknowledged by the callsign only of the acknowledging unit.

14.1.1.4         An acknowledgment must not be given until the receiving operator is satisfied that the transmitted information has been received correctly.

14.1.2              Telephony Protocols

14.1.2.1         The use of radiotelephony on aeronautical channels is to be in accordance with ICAO Annex 10, Vol. II, ICAO PANS-ATM and the Australian Aeronautical Information Publication (AIP). However, the AIP takes precedence in the event of any inconsistency.

14.1.3              Aeronautical Fixed Telecommunications Network

14.1.3.1         The use of the Aeronautical Fixed Telecommunication Network (AFTN) must be in accordance with the provisions of ICAO.

Notes to Manual of Standards Part 172
Note 1
The Manual of Standards Part 172 (in force under the Civil Aviation Safety Regulations 1998) as shown in this compilation comprises Manual of Standards Part 172 amended as indicated in the Tables below.

Table of Manual of Standards and Amendments
Year and                                                                                              Date of notification      Date of                                                                       Application, saving or
number                                                                                                in Gazette/               commencement                                                                  transitional provisions
                                                                                                      registration on FRLI/FRL
MOS 172                                                                                               1 May 2003                1 May 2003                                                                    —
MOS 172 2005 Amendment No. 1                                                                          FRLI 15 September 2005    16 September 2005 (see s. 2)                                                  —
                                                                                                      (see F2005L02651)
MOS 172 2006 Amendment No. 1                                                                          FRLI 28 March 2006        29 March 2006                                                                 —
                                                                                                      (see F2006L00929)         (see s. 2)
MOS 172 2008 Amendment No. 1                                                                          FRLI 19 November 2008     20 November 2008 (see s. 2)                                                   —
                                                                                                      (see F2008L04329)
Manual of Standards Part 172 Amendment (No. 1) 2010                                                   FRLI 31 May 2010          03 June 2010                                                                  —
                                                                                                      (see F2010L01259)         (see s. 2)
Manual of Standards Part 172 Amendment (No. 1) 2011                                                   FRLI 29 April 2011        s. 1, 2, 3 and 4, Schedule 1 (items 1-6, 8, 9) and Schedule 2: 30