52 Pa. Code § 37.222 – Out-of-service criteria.

(a) The driver out-of-service criteria can be found in the Commission’s Uniform Out-Of-Service Criteria.
(b) The Commission’s Uniform Out-of-Service Criteria may be obtained by contacting: Pennsylvania Public Utility Commission, Motor Carrier Enforcement Division, Post Office Box 3265, Harrisburg, Pennsylvania 17105-3265.

This section cited in 52 Pa. Code § 37.205 (relating to additions or modifications to 49 CFR).