In Victoria, it is an offence to engage in certain sexual behaviours against, with or in front of, a child. Many of these behaviours are reportable conduct under the Reportable Conduct Scheme.
This includes:

A full list of the relevant sexual offences is set out in clause 1 of Schedule 1 to the Sentencing Act 1991.
A person does not need to be charged with, or found guilty of, a sexual offence for their behaviour to be reportable conduct.