The county authorities shall be responsible for determining the best possible fee for the purchase of services. The availability of alternative methods for purchasing services may not be construed as mandating the payment of a fee which is higher than necessary and reasonable for the service. The county/joinder shall be responsible for the effective execution of each purchase of service agreement.
55 Pa. Code § 4300.113
This section cited in 55 Pa. Code § 4300.111 (relating to applicability).