Three of the world’s biggest pornography sites will be hit with new regulatory curbs including stricter requirements on age verification, after EU regulators determined the adult platforms fell within the scope of a landmark law designed to police content online.

Xvideos, Pornhub, and Stripchat will be from April subject to the obligations of “very large online platforms” under the Digital Services Act (DSA), according to three people familiar with the move.

That designation applies to platforms with more than 45 million users and has so far been applied to tech groups such as Facebook, Wikipedia, and TikTok.