but yeah for real the big opt out button is over at https://www.myhealthrecord.gov.au/for-you-your-family/opt-out-my-health-record and it takes 2 seconds and needs only your ID (license, passport, &c accepted) and your medicare card and I firmly believe you should opt out and not trust this system
this government continues to show no desire to improve on IT projects and their security, and now acts in absolute bad faith around medical consent and confidentiality