No visa label required. The Australian Government does not require you to have a visa label placed into your passport for travel to Australia. However, if you are transiting or exiting through another country, it is your responsibility to check with the relevant government authorities regarding requirements to show a visa label in your passport. The Australian Government cannot advise on other countries' requirements.
More information on travelling without a visa label and visa entitlements verification is available at www.immi.gov.au/myvisa/about