Representatives Ted Lieu (D-Calif.) and Nathaniel Moran (R-Texas) introduced the AI Kill Switch Act, mandating large AI companies with highly autonomous, CBRN-capable models to maintain a capacity to disable their models in case of catastrophic misuse or loss of control. The bill also requires preservation of relevant telemetry for ex post investigations, excluding unintended incidents reported within 30 days that do not cause severe harms (10+ deaths, $100M+ damages).