Instagram, facing scrutiny from federal regulators, recently unveiled its “Teen Accounts” program. That’s a significant shift from the social media giant’s previous freewheeling approach to content regulation.

The new program by Instagram, which about half of U.S. teenagers use daily, moves all future and existing accounts of those under 18 years of age to private mode. In practice, that means teenage users will have to approve new followers before they can see, like, or comment on posts.