HELENA, Mont. (AP) Montana became the first state in the U.S. to completely ban TikTok on Wednesday when the states Republican governor signed a measure thats more sweeping than any other states attempts to curtail the social media app.

The measure is expected to be challenged legally and will serve as a testing ground for the TikTok-free America that many national lawmakers have envisioned.

Some lawmakers, the FBI and officials at other agencies are concerned the video-sharing app, owned by the Chinese tech company ByteDance, could be used to allow the Chinese government to access information on American citizens or push pro-Beijing misinformation that could influence the public. TikTok says none of this has ever happened.

When Montana banned the app on government-owned devices in late December, Gov. Greg Gianforte said TikTok posed a significant risk to sensitive state data. More than half of U.S. states and the federal government have a similar ban.

Gianforte signed the legislation after it easily passed through Montanas GOP-controlled Legislature.

Montanas new law prohibits downloads of TikTok in the state and would fine any entity an app store or TikTok $10,000 per day for each time someone is offered the ability to access the social media platform or download the app. The penalties would not apply to users.