Australia announced a landmark legislative measure on Thursday that would set a minimum age of 16 years for children to use social media platforms, making the platforms responsible for enforcing the rule.

“Social media is harming our children, and I’m putting a stop to it,” Prime Minister Anthony Albanese said.

The legislation will be presented in Parliament during its last two weeks of session this year, beginning on November 18. The age limit would take effect 12 months after the law is passed, Albanese told reporters.

Social media platforms like TikTok, Instagram and Facebook would have a year to figure out how to prevent Australian children under 16 from accessing their platforms.

“I’ve spoken to thousands of parents, grandparents, aunties and uncles. They, like me, are deeply concerned about the safety of our children online,” Albanese said.

The proposal comes as governments worldwide grapple with how to oversee young people’s use of technologies such as social media and smartphones.

Social media platforms would be penalized for violating the age limit, but underage children and their parents would not.

“The onus will be on social media platforms to demonstrate they are taking reasonable steps to prevent access. The onus won’t be on parents or young people,” Albanese said.

Antigone Davis, head of safety at Meta, which owns Facebook and Instagram, said the company would abide by any age limitations the government chooses to implement.

“However, what’s missing is a deeper discussion on how we implement protections, otherwise we risk making ourselves feel better, like we have taken action, but teens and parents will not find themselves in a better place,” Davis said in a statement.

She added that stronger tools in app stores and operating systems for parents to control what apps their children can use would be a “simple and effective solution.”

X did not immediately respond to a request for comment on Thursday. Twitter declined to comment.

The Digital Industry Group Inc., an advocate for the digital industry in Australia, described the age limit as a “20th Century response to 21st Century challenges.”

“Rather than blocking access through bans, we need to take a balanced approach to create age-appropriate spaces, build digital literacy and protect young people from online harm,” DIGI managing director Sunita Bose said in a statement.

More than 100 experts in fields related to technology and child welfare signed an open letter to Albanese last month opposing a social media age limit as “too blunt an instrument to address risks effectively.”

Jackie Hallan, a director at the youth mental health service ReachOut, opposed the ban. She said 73% of young people across Australia accessing ReachOut support did so through social media.

“We’re uncomfortable with the ban. We think young people are likely to circumvent a ban and our concern is that it really drives the behavior underground and then if things go wrong, young people are less likely to get support from parents and carers because they’re worried about getting in trouble,” Hallan said.

Child psychologist Philip Tam said a minimum age of 12 or 13 would have been more enforceable.

“My real fear honestly is that the problem of social media will simply be driven underground,” Tam said.

Australian National University lawyer Associate Prof. Faith Gordon feared separating children from their platforms could create pressures within families.

Albanese said there would be exclusions and exemptions in circumstances such as a need to continue access to educational services.

But parental consent would not entitle a child under 16 to access social media.

Earlier this year, the government began a trial of age verification technology. Australia’s eSafety Commissioner, the online watchdog that will police compliance, will use the results of that trial to provide platforms with guidance on what reasonable steps they can take.

Communications Minister Michelle Rowland said the year-long lead-in would ensure the age limit could be implemented in a “very practical way.”

“There does need to be enhanced penalties to ensure compliance,” Rowland said.

“Every company that operates in Australia, whether domiciled here or otherwise, is expected and must comply with Australian law or face the consequences,” she added.

The main opposition party has given in-principle support for an age limit at 16.

Opposition lawmaker Paul Fletcher said the platforms already had the technology to enforce such an age ban.

“It’s not really a technical viability question, it’s a question of their readiness to do it and will they incur the cost to do it,” Fletcher told Australian Broadcasting Corp.

“The platforms say: ’It’s all too hard, we can’t do it, Australia will become a backwater, it won’t possibly work.’ But if you have well-drafted legislation and you stick to your guns, you can get the outcomes,” Fletcher added.