That is actually up to Facebook (and/or other social media companies) to work out because:
"Under the laws, which won't come into force for another 12 months, social media companies could be fined up to $50 million for failing to take "reasonable steps" to keep under 16s off their platforms.
There are no penalties for young people or parents who flout the rules."
So any visitors or residents to Australia won't actually have to worry about it.
