Commonwealth Consolidated Regulations

CIVIL AVIATION SAFETY REGULATIONS 1998 - REG 61.675

                   The holder of an air transport pilot licence is authorised to pilot an aircraft in a single-pilot operation under the IFR only if the holder has:

                     (a)  passed the flight test for an instrument rating in a single-pilot aircraft; or

                     (b)  completed an instrument proficiency check in a single-pilot aircraft.