Australia has specific visa requirements that vary depending on your nationality and the purpose of your visit. Most international delegates attending conferences or business events in Australia will need a Business Visitor visa, which falls under the subclass 600.

All international travellers (with the exception of New Zealand passport holders) must obtain a valid visa before travelling to Australia. For international delegates, this process is extremely simple. Through the Australian Electronic Travel Authority (ETA) system, travellers from a range of countries can apply for an ETA on the Internet, through a travel agent or airline. The ETA is the electronic equivalent of a visa for the short-term traveller, which replaces the passport visa label or stamp. 

Most online applications are processed instantly with travellers enjoying the added benefit of faster processing at the airport. Approved applications are electronically recorded on Australian Government systems and can be electronically confirmed by airline check-in staff prior to boarding. For visitors who are not eligible for an ETA, Australian visitor visas may also be issued on the spot or in most cases within 24 hours at Australian Embassies and Consulates overseas. 

For more information, visit: https://immi.homeaffairs.gov.au/visas/getting-a-visa/visa-finder