Document ID: chunk:federal_register_of_legislation:F2025C00187:reg:3:p4
Version: federal_register_of_legislation:F2025C00187
Segment Type: reg
Provision Reference: reg 3 (pt 4/7)
Character Range: 126277–128958

planning for a flight is based on a TAF3; and
(b) the ETA of the flight is within the first 3 hours of the TAF3 validity period; and
(c) the ETA does not fall outside the end time (if any) specified for the TAF3 service.

8.03 Definition of relevant IAP
       (1) In this Chapter:
relevant IAP for an aerodrome outside Australian territory is the IAP that the pilot in command of an aircraft determines has the second lowest minimum altitude of the IAPs that the aircraft is able to conduct at the aerodrome (conductible IAPs).
 (2) For subsection (1), in determining which conductible IAP has the second lowest minimum altitude, the pilot in command must comply with the following constraints:
(a) the conductible IAPs that may be considered in determining the IAP with the lowest, and hence the second lowest, minimum altitudes must not both require use of the same radio navigation aid;
       Note   Radio navigation aid is a defined term in the CASR Dictionary. An example of this mandatory constraint is an aerodrome that has the following IAPs to a specific runway (from lowest to highest minimum altitude): an ILS with CAT I and CAT II minima that both require the use of a non-associated DME; a VOR that uses the same DME as the ILS; a GNSS with LNAV minima; and an NDB. The CAT II minima cannot be used and, therefore, cannot be the lowest minimum altitude and VOR could not be considered to have the second lowest minimum altitude as it shares a required radio navigation aid with the ILS (namely, the same DME).
(b) CAT II and CAT III minimum altitudes must not be used in determining altitudes for the relevant IAP.

Division 8.2 Destination alternate aerodromes

8.04 Destination alternate aerodromes — weather
       (1) Subject to subsection (2), the pilot in command of an aircraft must nominate a destination alternate aerodrome if the ETA at the planned destination aerodrome is during the period that:
(a) begins 30 minutes before the forecast commencement of relevant weather conditions at the planned destination aerodrome; and
(b) ends 30 minutes after the forecast ending of relevant weather conditions.
Note   For relevant weather conditions, see section 8.02.
       (2) If:
(a) flight planning is based on a TAF3; and
(b) the ETA at the planned destination aerodrome:
 (i) is within the first 3 hours of the TAF3 validity; and
 (ii)  does not fall outside the end time (if any) specified for the TAF3 service;
        then the pilot in command of an aircraft must nominate a destination alternate aerodrome if the ETA is during the period that:
(c) begins at the forecast commencement of relevant weather conditions at the planned destination aerodrome;