The European Union has accused social media giants Facebook, Instagram and TikTok of breaking new digital transparency rules under its Digital Services Act (DSA).

According to the European Commission, the three platforms failed to give users clear ways to report illegal content or appeal moderation decisions. They were also found to have restricted researchers’ access to important public data about how the platforms work and handle content.

The Commission said these actions go against the DSA, which aims to make big tech companies more accountable for the information shared on their platforms.

If found guilty after the investigation, each company could face fines of up to six percent of their global yearly revenue.

Meta, which owns Facebook and Instagram, said it disagreed with the findings but was working to improve its reporting and data access systems. TikTok also said it supported transparency but claimed some EU requirements might conflict with data protection laws.

The EU launched its investigations into Meta and TikTok last year as part of efforts to enforce stricter rules on online safety and transparency.