Document ID: chunk:federal_register_of_legislation:F2025C00187:reg:3:p2
Version: federal_register_of_legislation:F2025C00187
Segment Type: reg
Provision Reference: reg 3 (pt 2/7)
Character Range: 392137–395020

that has a certificated MTOW above 5 700 kg; or
(b) that is capable of normal operation at a maximum cruising true airspeed above 250 kts;
        then the transponder's receiving and transmitting antennae must:
(c) be located in the upper and lower fuselage; and
(d) operate in diversity, as specified in paragraphs 3.1.2.10.4 to 3.1.2.10.4.5 (inclusive) of Volume IV, Surveillance and Collision Avoidance Systems, of ICAO Annex 10.
Note   Paragraph 3.1.2.10.4.2.1 is recommendatory only.
       (7) Subject to subsection (8), an aircraft fitted with, or carrying, ADS-B OUT equipment that is not an approved ADS-B OUT equipment configuration, approved EC device configuration, approved integrated TABS configuration or approved Mode S transponder with Class B TABS position source device configuration, must not fly in Australian territory, unless the equipment is:
(a) deactivated; or
(b) set to transmit only a value of zero for the NUCp, NACp, NIC or SIL.
Note   It is considered equivalent to deactivation if NUCp, NACp, NIC or SIL is set to continually transmit only a value of zero.
       (8) Subsection (7) does not apply to an aircraft if it is undertaking an ADS-B test flight in VMC in airspace below FL 290.

26.71 Alternate GNSS position source for ADS-B OUT — requirements
       (1) For an aircraft first certificated in its country of manufacture on or after 8 December 2016, an alternate GNSS position source is acceptable if the source:
(a) is certified by the NAA of a recognised country for use in IFR flight; and
(b) has included in its specification and operation the following:
           (i) GNSS FDE, computed in accordance with the definition at paragraph 1.7.3 of RTCA/DO-229D;
           (ii) the output function HPL, computed in accordance with the definition at paragraph 1.7.2 of RTCA/DO-229D;
           (iii) functionality that, for the purpose of HPL computation, accounts for the absence of the SA of the GPS in accordance with paragraph 1.8.1.1 of RTCA/DO-229D.
       (2) For an aircraft first certificated in its country of manufacture before 8 December 2016, an alternate GNSS position source is acceptable if it meets the requirements of subsection (1), other than subparagraph (1) (b) (iii) which is optional.

26.72 Alternate ADS-B OUT equipment configuration — requirements
        An alternate ADS-B OUT equipment configuration must meet the following requirements:
(a) it has been approved or accepted by:
 (i) the NAA of a recognised country as meeting the standards of EASA AMC 20-24 or EASA CS-ACNS; or
 (ii) the FAA as meeting the standards of 14 CFR 91.225 for 1090 Megahertz (MHz) Extended Squitter ADS-B; and
(b) the AFM or flight manual supplement attests to the certification; and
(c) the GNSS system meets the relevant performance requirements mentioned in section 26.71.

      26.72A Approved Mode S transponder with Class B