Okla. Stat. tit. 6, § 6-602.1: Detached facilities, branch offices, deposit production

offices and loan production offices - Business days and hours.

If a bank, credit union, or savings association has one or more

detached facilities or branch offices or deposit production offices

or loan production offices, those facilities, branches, or loan

production offices may be open at times and on days which are

different from the hours and days the main office is open, as

specified in the organization's plan. Notice of a change in hours

or days of operation should be furnished to customers to the extent

practicable.