9 CFR 354.26 - Schedule of operation of official plants.
Inspection operating schedules for services performed pursuant to § 354.107 shall be requested in writing and be approved by the Administrator. Normal operating schedules for a full week consist of a continuous 8-hour period per day (excluding not to exceed 1 hour for lunch), 5 consecutive days per week, within the period of Monday through Saturday, for each shift required. Less than 8-hour schedules may be requested and will be approved if an inspector is available. Sundays may not be approved in any tour of duty. Clock hours of daily operations need not be specified in the request, although as a condition of continued approval, the hours of operation shall be reasonably uniform from day to day. Inspectors are to be notified by management 1 day in advance of any change in the hours inspection service is requested.