Traveller in Time wrote:Xiija wrote:within 25 miles of a licensed marijuana store, home cultivation is prohibited
Glad Europe will not get a chance dividing the lands in federal and whatever

That situation wouldn't arise because there is little "free" land left in Europe to divide or designate as "public." In the western US, about 47% of all land is federally owned "public" land.
Often this is a good thing for citizens (not so much for developers). As public land, anyone can go enjoy the land within reasonable limitations, and that can even include hosting a huge event like BM. In theory anyway.
The real problem in this case is not who owns the land, but the differing legal status of marijuana at the state and federal level. If marijuana were made legal at the federal level there would be no issues, but at this time only some states are decriminalizing marijuana. It would be like a city in Europe legalizing pot, but the country itself still designating it illegal. Some bizarre situation could arise where the local magistrates wouldn't enforce the anti-pot laws, but police under national jurisdiction would.
At BM, in Nevada, I'm unsure whether federal law enforcement would bother pulling over an searching vehicles, or whether local police would be responsible. If the latter, they would not be able to fine the users for pot possession below a certain limit. I'm sure they'll find some other excuse to generate money from fines though.