The Supreme Court will convene for a rare oral argument session on Friday to consider a set of landmark cases that could permanently alter the way millions of people consume online content. TikTok, the video-based social media app used by more than 160 million users in the United States,

Justices will hear arguments in two consolidated cases taking aim at the federal law, which requires Chinese-owned ByteDance to divest from TikTok, or else TikTok will be banned from U.S. app stores and from being hosted by American internet service providers.

The Supreme Court will hear two hours of oral arguments on Jan. 10 in TikTok’s appeal to block enforcement of a federal law that would require TikTok to shut down in the United States unless its parent company can sell off the U.