On 6 July 2026, Illinois Governor JB Pritzker signed SB 315, the "Artificial Intelligence Safety Measures Act," making Illinois the first US state to require independent third-party safety audits at major AI companies. The law had passed in May and was widely watched as a model for other states.
The rule is simple in spirit but strict in practice. Companies that develop large AI systems will have to open their models and processes to outside auditors who can check whether the systems are safe, transparent, and accountable. The audits are meant to be real reviews, not a paperwork exercise, and the results are expected to carry weight with regulators and customers alike.
Illinois is following a pattern that began with California's transparency law and New York's similar efforts. But this bill goes further by making outside audits mandatory rather than voluntary. The thinking is that internal safety teams are not enough when the products affect millions of people; an independent check is needed to keep companies honest.
For AI companies, the new law means real costs and real changes. Audits take time, money, and people, and they can expose weaknesses that companies would rather hide. Some critics worry the rules will push smaller firms out of the market, since only the biggest players can afford the compliance burden. Others argue that strong oversight is the only way to keep public trust as AI becomes more powerful.
For the rest of the country, Illinois is now the test case. If the audits work and the sky does not fall, expect many other states to copy the model. If they cause friction, expect lawmakers to soften the rules. Either way, the era of self-policed AI safety is starting to close.