But it does mean that it will actually, for the first time ever in living memory, be possible for someone to fully federally legally possess a THC-active form of cannabis without further Congressional action. I'm not sure if a state-legal cannabis supply chain could be fully federally legal in this context, but imagine if a pharma company goes through the FDA approval process for a THC pill and then doctors prescribe it for patients based on their medical judgment that it will help alleviate pain for some chronic condition like Crohn's disease. (I expect both of those steps to happen in practice, over time of course due to how many prerequisites exist for FDA approval, to the extent they haven't already been begun.)

Imagine a noncitizen in that situation being able to tell a border officer, or a citizen being able to tell a security clearance investigator: "Yes, I do use THC. Here's my prescription and the bottle from the pharmacy." and being confident of no negative repercussions. Wonderful progress compared to where we are now.

I think the point is that banks are no longer automatically required to reject any customer that deals with weed, because some of those transactions are going to be legal under the federal law. Which basically allows them to look the other way for all such transactions.

"'without a DEA licensed rx and dea licensing'"

I know of several grocery stores without pharmacies or a local Rx license selling 1% hydrocortisone/hydrocortisone acetate - Schedule 4, 3, AND 2, simultaneously.