The proposal, which Zuckerberg will present during his testimony before the House Energy and Commerce Committee on Thursday, would raise the bar for social media companies that are currently granted immunity from liability for the content that appears on their platforms. That immunity, granted by Section 230 of the Communications Decency Act of 1996, has come under fire in recent years from Republicans and Democrats.

While meant to ensure that companies are taking action against unlawful content, the changes could theoretically shore up Facebook’s power, as well as that of other internet giants like Google, by requiring smaller social media companies and startups to develop robust content moderation systems that can be costly.

“Instead of being granted immunity, platforms should be required to demonstrate that they have systems in place for identifying unlawful content and removing it,” Zuckerberg will say in his opening remarks, according to written testimony released on the House Committee website Wednesday.