CAR 233 requires carriage of maps, charts and other aeronautical information and instructions, published in the AIP or by a person approved in writing.
While Jeppesen are approved as a provider, you will probably find the iPad has yet to be approved in Australia. There is a requirement that these devices where not permanently mounted in the aircraft (and hence subject to the normal certification process) be demonstrated to CASA to reliably meet the intended electronic flight bag functions.