The Illinois House of Representatives passed a bill on Wednesday requiring frontier AI labs like OpenAI, Anthropic, and Google DeepMind to have their safety practices audited by a third party. If signed into law, AI safety experts tell WIRED, it would be the nation’s leading check on the power of major AI companies . The bill, SB 315, now heads to governor JB Pritzker’s desk. In a post on social media on Wednesday, Pritzker said he plans to sign the bill, citing a need to hold Big Tech accountable. Since Congress has yet to pass any meaningful AI safety legislation, state lawmakers have happily stepped up in recent years to promote bills that show their constituents they’re keeping Silicon Valley in check. As AI tools become increasingly popular, and the companies behind them race toward massive IPOs , polls show that American voters are looking for more AI regulation .…