You know what burns my butt, it took me 2 years to get my solid fuels license here in Maine, I was forced to hire a local guy who held a Masters License that was grandfathered to him, he knew almost nothing about outdoor wood boilers but he had the papers, The solid fuels license is required by our socialist state for any system tying in to a central heating system, it is mandatory that we MUST make all upgrades to the entire system in order to bring the entire system up to code or our license is in jeopardy as well as a liability suit could be levied against us for all costs of the upgrades.
On the other hand, a wood burning stove or pellet stove can be installed by a contractor who has no license, experience or knowledge of the products or venting, I would bet that my written test on solid fuels was at least 80% on venting and mostly do do with pellets! I have never installed a pellet or wood stove but I have certainly seen some hacked stove installs by so called unlicensed professionals.
I'm not a create new laws type of guy but I think if a hack puts in a stove and it burns the home down or does bodily injury to somebody then the contractor should be held responsible.