The American Bank Association has released a statement regarding the necessity to allow banks and cannabis businesses to work together, and not to get blindsided by the reclassification of cannabis.
"While ABA takes no position on the legalization of cannabis, it's important for policymakers to know that any potential decision to reclassify cannabis has no bearing on the legal issues around banking it. Cannabis would still be largely illegal under federal law, and that is a line many banks in this country will not cross. The solution is the bipartisan SAFER Banking Act, which would allow banks to provide services to the cannabis industry in those states where it's now legal. Passing that legislation in Congress would address the ongoing legal limbo around cannabis banking, while enhancing public safety, tax collection and transparency."
For more information:
American Bankers Association 
www.aba.com