Australia said on Wednesday it will add YouTube to sites covered by its world-first ban on social media for teenagers, reversing an earlier decision to exempt the Alphabet-owned video-sharing site and potentially setting up a legal challenge.

The Australian government has announced YouTube will be required to ensure account holders are at least 16 years old starting in December.

Australia includes YouTube in its under-16 social media ban after removing platform exemption. New rules target accounts while allowing video viewing for minors