You must be a member with a user account, then you can follow the instructions in our publication https://www.auscert.org.au/publications/2017-04-11-using-api/
Early warning notifications assist in managing critical security threats to your network. AusCERT monitors malicious activity online and the Early Warning Service provides SMS notifications of any immediate and serious threats relevant to your industry.
Receive a 24/7 early warning SMS service relevant to your industry.
The SMS states:
Join a nationally trusted company and get 24/7 data security