What does that mean in practice? It's legal in California, but the FBI might arrest you if you go to Yosemite National Park with cannabis?

And airports and other places that are nominally under federal control. That said, airports generally care more about bombs and hard drugs, but the risk is higher than a bottle of bourbon.

It's also still a disqualifier for federal employment.

For a start it means no bank can legally lend you money for your cannabis business or they would be subject to prosecution.

A cursory google search shows that as a result of that stipulation there are in fact financing packages or lenders that acknowledge the risk and seek to meet that demand.