1. Short title This Act may be cited as the Buck Stops Here Act . 2. Transactions connected to illicit fentanyl trafficking (a) Determination If the Secretary of the Treasury determines that reasonable grounds exist for concluding that 1 or more financial institutions operating outside of the United States, or 1 or more classes of transactions within, or involving, a jurisdiction outside of the United States, or 1 or more types of accounts within, or involving, a jurisdiction outside of the United States is of primary money laundering concern in connection with illicit fentanyl trafficking, the Secretary of the Treasury may, by order, regulation, or otherwise as permitted by law— (1) require domestic financial institutions and domestic financial agencies to take 1 or more of the special measures described in section 5318A(b) of title 31, United States Code