This shouldn't be solved at the government level, but at the family level. By parents talking to kids.
Also, unless they implement something like the PRC's firewall, it will a 100% be an inept solution that's easy to get around.
Yes, you can say it should start from young age, but both parents are at work and kids are left with high-speed internet and tablets. They react positively to porn and can get addicted - its a single click away. Hard to prevent that, eh.
I think we will witness the true effect of porn on males mind in future.
But, this kind of age verification bullshit will not help anyone. The politicians will be able to say they did something, and the parents will feel that they don't have to worry about this, making their children even more vulnerable.
I think porn addiction, and its effects are a societal issue, that can not be solved by legislation, only by making it a non-taboo topic, and talking about inside the family.
Edit, ps: your replies are marked as dead for some reason when you make them, and I had to vouch for it before being able to reply.
I remember when cigarette vending machines were banned. I'm sure it had 0.000000 (repeating of course) percent effect on the availability of cigarettes to kids who were motivated to get them. Same with alcohol regulations. Same with weed. Anyone with even an ounce of motivation can and will bypass.