California will shut him down unless it is eco friendly green, it’s manufacture has a very low carbon footprint, and meets or exceeds CAFE standards for mileage.
Not to mention is biodegradable and completely Vegan.
He will just have to do what so many other businesses are doing: move out of Khalifornistan. There's forty-nine other states and many of them are much friendlier to do business in.
I don't think states can regulate emissions on aircraft.