I’m in the province of Manitoba Canada. Our rules are brutal. I have to come up with external bumpers front and rear. As well as a rear view mirror (non camera type). Three point seat belts only. No quick connect steering wheels. The fender vents is a grey area. I’m sure they would pass tech in most US States.Ken, I couldn't find anywhere that stated fender vents are illegal, but maybe I wasn't using the right search terms. Fender vent, gill slot, louvers... Have you any experience that indicates they might be?