Okla. Stat. tit. 12A, § 4A-403
Oklahoma Code Comment
A funds transfer system may provide a time at which settlement is completed among its members. The rule may also permit offset between system members or between a member and the aggregate transactions with all members through the system.
If two banks transmit payment orders to each other, they may agree to settle their obligations at the end of the day or other period. The total amount of orders transmitted by one bank may be set off against the total amount of orders transmitted by the other.