Re: Transporting a gas can
If it is a container designed for gasoline, is sealed, and in the open, not down in a compartment, don't know what they could find wrong with it. Example is an outboard motor in an open boat, like a 10 hp engine on a 14' semi/v fishing boat. Container designed for the product, open vent in this case as you are using fuel from it, and in the open. Apples and apples. Have done it numerous times.
I would cover it with a tarp or something to keep it out of the sun; reduce the vapor pressure.
HTH,
Mark