The federal law that affects the provision of banking services to marijuana businesses is the Bank Secrecy Act of 1970 ( 31 USC 5311 - 5330). This law has created a "cash & carry" marijuana industry. Since marijuana possession and sales are still federal crimes if banks accept funds from marijuana businesses they may face federal criminal liability for "aiding and abetting" and money laundering. Reform is in the works, but is slow going. Hemp, and products containing cannabidiol (CBD) are finally legal under federal law.