6 Pa. Code § 11.242
The center will be advised in advance of the date of the annual inspection. The annual inspection will be an announced inspection and will occur during normal business hours.
This section cited in 6 Pa. Code § 11.211 (relating to purpose); 6 Pa. Code § 11.212 (relating to applicability); and 6 Pa. Code § 11.213 (relating to additional definitions).