"Officials also expect any code of practice to require that social media companies use fact-checking services during elections, promote "authoritative" news services, and generally try to counter the echo chamber in which many users are exposed to viewpoints they already agree with."

"Regulators proposed that the new rules apply to companies that "allow users to share or discover user-generated content or interact with each other online." The broad language encompasses "a very wide range of companies of all sizes," the report said, "including social media platforms, file hosting sites, public discussion forums, messaging services and search engines."