It’s a question on a federal background check. For people who live in states where scheduled drugs are legal for recreation, it’s a grey area. The state wouldn’t care, but the feds do.
It’s basically boils down to “gotcha” requirements. If you get investigated for federal crimes and also own firearms but live in a state where some scheduled drugs are legal that you use, the fed can still just flag any future checks and charge you with lying on any previous background checks.
I am not a fan of that kind of legal fuckery, especially if a person happens to be charged with a crime they didn’t commit and still get investigated.