VIC What are the laws around publishing and sharing my photography of other people?

I am a portrait photographer in Australia. I want to publish and share images I have taken on ABC Open and other sites. Some of them show other people (mostly minors/children under 18) who have said yes to me taking their photo, but I have not received their parent\'s permission. Am I allowed to publish or share these without their parent\'s permission?

Please note: These are people I met in public places (eg. a local park) and I do not know them or have a way of contacting them or their parents. The photos are of them in these public places, not in any private areas.

 

Thank-you very much for your advice!