The Civil Aviation Safety Authority advised the ATSB on 3 April 2006 that it has amended Civil Aviation Order 40.2.1, Instrument Ratings, to clarify the requirement for all instrument rating holders to hold an endorsement for any navigation aid being used to navigate an aircraft (including instrument approaches of which they are a crew member. The amendment does, however, provide an exemption for co-pilot crew members who do not hold an endorsement but have received equivalent training and demonstrated proficiency in the use of the navigation aid while participating in an operator's cyclic training and proficiency programme. The amendment became effective on 25 March 2006.

ATSB Note:

The wording of Civil Aviation Order 40.2.1 paragraph 13.3.4 prior to the amendment of 25 March 2006:
For the purposes of regulation 5.16, it is a condition of each instrument rating that the holder of the rating must use only the types of navigation aids or procedures endorsed in the holder's personal log book when exercising the authority given by the rating.

The amended wording of CAO 40.2.1 paragraph 13.3.4 is:
For regulation 5.16, it is a condition of each instrument rating that the holder may act as pilot in command or co-pilot of an aircraft being flown under the IFR only if each navigation aid or procedure that is used to navigate the aircraft during flight has been endorsed in his or her personal log book.