On 4 February 2009, instrument CASA EX06/09
<
http://www.casa.gov.au/rules/miscinst/2009/CASAEX06.pdf>
(Exemption – use of radio-navigation aids by Airservices
Australia) was registered on the Federal Register of Legislative
Instruments and comes into effect on 5 February 2009. This instrument
exempts Airservices Australia from the requirement of regulation
173.105 of the Civil Aviation Safety Regulations 1998 (CASR 1998) that
instrument flight procedures should not be designed to use
ground-based radio-navigation aids unless the aids are operated and
maintained by a person certificated to do so under Part 171 of CASR
1998.