The EU is poised to unveil a landmark law on Friday that will force Big Tech to police their platforms more aggressively over illegal content, marking the latest move by regulators to curb the power of large technology groups.

The controversial practice of targeting users online based on their religion, gender or sexual preferences will be banned under the Digital Services Act, according to four people with knowledge of the discussions.

The DSA is a legislative package that sets for the first time the rules on how Big Tech should keep users safe online. It comes a month after the EU passed the Digital Markets Act, as it pushes ahead with the biggest overhaul of the laws governing the world’s biggest technology companies in more than two decades.