Section 210.45 - Payment orders(a)Rejection. A sender shall not send a payment order to a Federal Reserve Bank unless authorized to do so by the Federal Reserve Bank. A Federal Reserve Bank may reject, or impose conditions that must be satisfied before it will accept, a payment order for any reason.(b)Selection of an intermediary bank. For an interdistrict transfer through the FedNow Service, a Federal Reserve Bank is authorized and directed to execute a payment order through another Federal Reserve Bank. A sender shall not send a payment order to a Federal Reserve Bank that requires the Federal Reserve Bank to send a payment order to an intermediary bank (other than a Federal Reserve Bank). A sender shall not send to a Federal Reserve Bank a payment order through the FedNow Service that instructs use by a Federal Reserve Bank of a funds-transfer system or means of transmission other than the FedNow Service, unless the Federal Reserve Bank agrees with the sender in writing to follow such instructions.(c)Execution date and payment date. A sender shall not issue a payment order through the FedNow Service that instructs a Federal Reserve Bank to execute the payment order or to pay the beneficiary on a FedNow funds-transfer business day that is later than the funds-transfer business day on which the order is received by the Federal Reserve Bank, unless the Federal Reserve Bank agrees with the sender in writing to follow such instructions.