Using TikTok Text-To-Speech for Paid Ads?

Super curious if anyone know the legalities of using Text-to-speech in paid ads on TikTok. 

I know in the past I wasn’t able to see Text-to-speech as an option on my brands accounts, but now it’s showing up. Just curious if anyone has ran into this or has a POV. 

I’m kind of in the “try it and find out” camp, but my production team is more risk adverse, haha.