Section 230 of the Communications Decency Act says tech platforms can’t be held liable for most things their users post on those platforms. The same section has been under attack recently from politicians and others who say it gives companies too much protection in this age of harassment, radicalization and misinformation. But even as the debate is happening, the law is being exported, so to speak. Language similar to Section 230 is part of U.S. trade agreements with Japan and made the cut in the recently agreed upon deal with Mexico and Canada.