The plan seeks to move the marijuana industry away from its cash-only roots. Banks routinely reject pot businesses for even basic services such as checking accounts because they fear running afoul of federal law, which considers marijuana and its proceeds illegal.

The result: Pot shop owners deal in large amounts of cash, which makes them targets for criminals. Or they try to find ways around the problem, like drenching their proceeds in air freshener to remove the stink of marijuana and try to fool traditional banks into accepting their money.

Colorado became the first state to allow recreational pot sales, which started Jan. 1. Washington state will follow suit, with retail sales expect to start in July.