Facebook announced strict new guidelines Wednesday prohibiting advertisements on the platform that in any way seek to "delegitimize" an election by stoking distrust in various voting methods, including mail-in voting.

What are the details?
"Last week we said we'd prohibit ads that make premature declarations of victory. We also won't allow ads with content that seeks to delegitimize the outcome of an election," Facebook's director of product management, Rob Leathern, said in a tweet.

He added that the new policy will ban ads that call "a method of voting inherently fraudulent" or use "corrupt isolated incidents of voter fraud to delegitimize the result of an election."

Facebook published the complete guidelines for its new policy in a blog post Wednesday. In the post, the company said that it is "taking preventive steps to protect the integrity of the upcoming US 2020 elections."