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 U.S. Supreme Court on Friday will hold a hearing on the ban of TikTok, which carries implications on the global marketplace, technology, freedom of speech and national security.

Lawyers for TikTok will argue that banning the app will violate the free speech of 170 million American users. The Justice Department will contend that the app is a national security risk.