Most international visitors to Australia will require a visa to enter the country. For Government details on visas visit the Department of Home Affairs site at https://immi.homeaffairs.gov.au/visas/getting-a-visa/visa-finder/work
Remember that if you need to make a visa Application ensure you do so well in advance as there is usually a processing period involved.
The Organiser does not provide assistance with visa applications for international visitors to the Expo. International visitors are welcome to attend but should ensure that they are pre-registered and have relevant supporting business credentials with them at all times during the expo. The Organiser reserves the right to refuse or withdraw entry at any time and will not be held liable for any matters relating to visas, expenses incurred or travel arrangements.