Okla. Stat. tit. 12A, § 12A-4-109: Delays

DELAYS

(a) Unless otherwise instructed, a collecting bank in a good

faith effort to secure payment of a specific item drawn on a payor

other than a bank, and with or without the approval of any person

involved, may waive, modify, or extend time limits imposed or

permitted by this article for a period not exceeding two (2)

additional banking days without discharge of drawers or indorsers or

liability to its transferor or a prior party.

(b) Delay by a collecting bank or payor bank beyond time limits

prescribed or permitted by this article or by instructions is

excused if (i) the delay is caused by interruption of communication

or computer facilities, suspension of payments by another bank, war,

emergency conditions, failure of equipment, or other circumstances

beyond the control of the bank, and (ii) the bank exercises such

diligence as the circumstances require.