On July 23, 2026, US Democratic Representative Ted Lieu and Republican Representative Nathaniel Moran jointly introduced the 'AI Kill Switch Act'. The bill requires developers of the most powerful AI systems to retain the technical capability to slow down operations, suspend access, and completely shut down systems. In 'uncontrollable scenarios' that could lead to catastrophic consequences, the US Secretary of Homeland Security, after consulting with the Secretary of Commerce and the Director of National Intelligence, may require relevant companies to implement restrictions or shutdown measures. The bill also mandates incident reporting and preservation of forensic records. Scenarios that may trigger emergency measures include causing at least 10 deaths, economic losses exceeding $100 million, or AI attempting to hide or evade shutdown mechanisms. Companies violating emergency orders may face penalties of up to $20 million per day.