Thanks for that! The Wiki has some good resources in regards to allowable data sources, Australia has a list here: https://wiki.openstreetmap.org/wiki/Australian_Data_Sources and a global list is here: https://wiki.openstreetmap.org/wiki/Potential_datasources

Still need to double check the licensing, you'll see in the AU list that there's some under CC-BY-SA which we normally can't use, but we've received a waiver from the data owner specifically allowing us to use it (we can't meet the attribution requirements as per the license, but often we'll get permission to have it listed elsewhere)