President Donald Trump has ordered a sweeping but unspecified ban on dealings with the Chinese owners of consumer apps TikTok and WeChat, although it remains unclear if he has the legal authority to actually ban the apps from the U.S.

The twin executive orders issued Thursday — one for each app — take effect in 45 days. They say they are necessary because the China-owned apps “threaten the national security, foreign policy, and economy of the United States,” and call on the Commerce Secretary to define the banned dealings by that time. While the wording of the orders is vague and appears to have been rushed out, some experts said it appears intended to bar the popular apps from the Apple and Google app stores, which could effectively remove them from distribution in the U.S.