ah, I assumed since the federal DOT is responsible for things like qualifying street-legal equipment (e.g. DOT-legal headlamp housings, windshields, etc) the CA

ah, I assumed since the federal DOT is responsible for things like qualifying street-legal equipment (e.g. DOT-legal headlamp housings, windshields, etc) the CA DOT was in a similar role at the state level. Could have sworn I'd read somewhere CA DOT simply reflects DOT regulations on such matters, but wouldn't the CA DOT still be responsible for enforcement if say Ford was selling new vehicles within CA with non-DOT headlamps?