Twitter announced Thursday that it will add a notice over politicians’ tweets if the social network deems the tweet to violate its rules.

The new system will begin effective immediately.

“In the past, we’ve allowed certain Tweets that violated our rules to remain on Twitter because they were in the public’s interest, but it wasn’t clear when and how we made those determinations,” the company said in the blog post.

“To fix that, we’re introducing a new notice that will provide additional clarity in these situations, and sharing more on when and why we’ll use it.”

This new feature will apply to all government officials, or those running for office, who have 100,000 followers or more and are verified accounts.

Twitter’s guidelines are extensive and broad, but specifically ban violent threats, targeted harassment, and “hateful conduct.”

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