In Oregon you can extract from a certified and permitted facility. Extracting outside one is a Class B felony. We lost the ability to extract our own concentrates outside a permitted facility, regardless of how safe and sane it was.
Nevada requires a certified facility as well, and I installed a Mk IVC at Medizin in Las Vegas, and demonstrated it to one of their state senators. I don't know what they do if they catch you doing so outside a permitted facility there.
We also installed a certified MK VB in Chelan, WA, who also requires a permitted facility.
WolfWurx's Mk IVC/VC certifications were for OR, WA, CO, NV, and MD, and were required to meet ASME, IEC, IBC, and NFPA-58.
I can understand why it's scaring the shit out of those looking on. Someone just blew up another house here in Portland, extracting BHO in the basement of a residence, and besides later dying himself, a visiting handyman working upstairs was killed as well. Houses next door were trashed.
As long as that sort of thing continues to happen, more and more laws will be written in an attempt to curb it. I've tried education as my foil every since I became involved with LPG extraction around 2007, and there is widespread agreement that indoor extraction outside a facility designed for it is insalubrious, yet we continue to see explosions from brothers and sisters doing so.