CAR 139 Documents to be carried in Australian aircraft
(1) Subject to subregulation (2), the pilot in command of an aircraft, when
flying, must carry on the aircraft:
(a) its certificate of registration;
(b) its certificate of airworthiness;
(c) unless CASA otherwise approves, its maintenance release and any other document approved for use as an alternative to the maintenance release for the purposes of a provision of these Regulations;
(d) unless CASA otherwise approves, the licences and medical certificates of the operating crew ;
(e) the flight manual (if any) for the aircraft ;
(f) any licence in force with respect to the radio equipment in the aircraft;
(g) if the aircraft is carrying passengers—a list of the names, places of embarkation and places of destination of the passengers;
(h) if the aircraft is carrying cargo—the bills of lading and manifests with respect to the cargo.
Penalty: 10 penalty units.
(2) An aircraft operating wholly within Australian Territory is not required, when flying, to carry a document specified in paragraph (1) (a), (b), (f) or (g).
Don't NEED a lot really. Especially when you take a look at sub para (2)!
And from AIP, references may have changed however..
5. CARRIAGE OF FLIGHT DOCUMENTATION
5.1 Pilots are required to carry, and have readily accessible in the aircraft,
the latest editions of the aeronautical maps, charts and other
aeronautical information and instructions, published:
a. in AIP, or
b. by an organisation approved by CASA,
that are applicable to the route to be flown, and any alternative
route that may be flown, on that flight (CAR 233).