Yep, suddenly these outside wood boilers that are illegal are legal when inside of a shed. They're also out of sight, so they can't be inspected from afar and penalties hurled without first obtaining a search warrant. Be smart about putting them inside of sheds, but at the same time, why not? You're not living in the shed, you typically don't keep your valuables in there, and you're not going to go inside if the shed is on fire. Yeah, you don't want your shed and firewood stash and boiler to burn up, but in the end, if it does, all you've lost is a cheap shed, a boiler (which is mostly rebuildable), and a firewood stash.
The install at my last house had an open sided structure with the roof half covering the boiler so my firewood was dry under cover and you could load the boiler, under cover. It was fantastic. At this house, I plan on getting a cheap carport to do the same thing. An all steel structure isn't very flammable and it's absolutely glorious not to have to dig your firewood out of the snow or uncover it with a tarp in the rain.