Okla. Stat. tit. 12A, § 12A-4A-106

TIME PAYMENT ORDER IS RECEIVED

(a) The time of receipt of a payment order or communication

canceling or amending a payment order is determined by the rules

applicable to receipt of a notice stated in Section 1-202 of this

title. A receiving bank may fix a cut-off time or times on a funds-

transfer business day for the receipt and processing of payment

orders and communications canceling or amending payment orders.

Different cut-off times may apply to payment orders, cancellations,

or amendments, or to different categories of payment orders,

cancellations, or amendments. A cut-off time may apply to senders

generally or different cut-off times may apply to different senders

or categories of payment orders. If a payment order or

communication canceling or amending a payment order is received

after the close of a funds-transfer business day or after the

appropriate cut-off time on a funds-transfer business day, the

receiving bank may treat the payment order or communication as

received at the opening of the next funds-transfer business day.

(b) If this Article refers to an execution date or payment date

or states a day on which a receiving bank is required to take

action, and the date or day does not fall on a funds-transfer

business day, the next day that is a funds-transfer business day is

treated as the date or day stated, unless the contrary is stated in

this Article.