Let's hope they answer something more than "refer to guidance"!
Unfortunately, the answer I received back was basically "refer to the guidance." I tried politely informing them that I read the guidance, and had a question about it, to which they responded a second time with actual quoted guidance. I gave it a third try, and got the same type of response.
They flat out won't answer a direct question about CBD/ the Food, Drug, and Cosmetics Act, which is pretty strange to me. If I were to ask whether deposits which I suspect were from the sales of drugs prohibited by the CSA, they'd essentially say that such activity would warrant reporting. Conversely, if I were to ask if the proceeds of a bake sale were subject to SAR filing, I'd imagine they'd tell me no, unless I had any concerns about the baked goods.