The operator of an official establishment desiring to work under conditions which will require the services of a program employe on any Saturday, Sunday, or holiday, or for more than eight hours on any other day, shall, sufficiently in advance of the period of overtime, request the officer in charge or his assistant to furnish inspection service during such overtime period, and shall pay the Department therefor an amount sufficient to reimburse it for the cost of the inspection services so furnished. It will be administratively determined from time to time which days constitute holidays.
7 Pa. Code § 1.46
This section cited in 7 Pa. Code § 1.2 (relating to application of inspection requirements).