55 Pa. Code § 3170.85
The appropriate county authorities are responsible for obtaining the best possible rate for purchase of services by the county children and youth agency. In addition, the appropriate county executive officers shall be responsible for the effective execution of each purchase of service agreement. The policies as applicable in §§ 3170.41-3170.49 (relating to personnel expenses), 3170.51-3170.61 (relating to operating expenses), and 3170.71-3170.77 (relating to fixed assets) may be used as guidelines for obtaining or establishing rates.
55 Pa. Code § 3170.85
This section cited in 55 Pa. Code § 3170.11 (relating to purpose); 55 Pa. Code § 3170.22 (relating to direct provision of services); and 55 Pa. Code § 3170.23 (relating to purchase of service).