The House of Representatives originally approved the measure on Friday of last week, but lawmakers in the House were forced to review it again after the Senate removed a provision involving the payment of World War II claims to residents in Guam.
As the analysts report, new Federal Reserve rules assert that alternative payment systems like PayPal are not payment card networks subject to a provision known as the Durbin amendment that caps interchange fees.
Earlier, Mr Grayling was questioned about his plans to overhaul the probation service with a payment-by-results model of provision involving private firms and voluntary groups.
Also included is a new Department of Defense (DOD) General Provision that would authorize the Secretary of the Navy to receive and retain payment in-kind for the settlement of the longstanding A-12 aircraft contract litigation.