I’ve only ever lived in Oregon and Washington, in both those states its legal if you are just doing it off existing rooftops and using it on your property. I think, in both those states you could run into issues (or at least need a permit and water rights) if you build a system specifically for catching water.

I think Colorado is the only state with the 110gal rule.

Maybe some specific state, county or city, but definitely not a general rule in the US.

Interesting. Never heard of it. Seems overly complicated to make it gender based. But I like the idea.

I like the idea of a Random Folks shed lol

That’s so cool! Such an amazing resource. I wish more library’s did that.