Operating schedules of an official establishment shall be subject to approval of the Director and for the purpose of this rule the normal operating schedule shall consist of a continuous 8-hour period per day (excluding not to exceed 1 hour for lunch), 5 days per week, within the period of Monday through Friday, for each full shift required. Any variation from such Monday through Friday schedule of operation must be fully justified and approved in advance by the Director. Clock hours of daily operations are not to be specified in a schedule although as a condition of continuance of approval of a schedule the hours of operation must be reasonably uniform from day to day.
Okla. Admin. Code § 35:37-5-14