Australia’s world-first legislation comes into effect Dec 10, curbing the globe’s most popular social media platforms and websites, including TikTok, Instagram, YouTube and Reddit.

US-based Reddit was one of the few remaining firms to say whether or not it would fall into line.

“While we disagree about the scope, effectiveness, and privacy implications of this law, as of Dec 10, we’re making some changes in line with these requirements,” the company said in a statement.

Reddit said it would not comment on local media reports that it was mulling a last-ditch legal challenge against the restrictions.

But it said it believed the laws would be a mistake.

“By limiting account eligibility and putting identity tests on internet usage, this law undermines everyone’s right to both free expression and privacy, as well as account-specific protections,” it said.

“We also believe the law’s application to Reddit – a pseudonymous, text-based forum overwhelmingly used by adults – is arbitrary, legally erroneous, and goes far beyond the original intent of the Australian Parliament, especially when other obvious platforms are exempt.”

Reddit said it would use an “age-prediction model” to weed out young users – and that all those deemed to be under 16 would be suspended.

It also said it would roll out enhanced safety features across the globe for all users under 18.