Tap from the after meter line into a compressor. No meter by-pass. It was explained as if you were adding another stove, furnace or water heater.
I think the issue in question was that the gov’t would resist a switch over to a system which they couldn’t tax separately like they do with gasoline currently.
If you’re tapping off you house, even after the house meter, they would probably require a separate “car meter” in order to tax you for the gasoline tax equivalent (to maintain the roads).