52 Pa. Code § 65.6
The provisions of this §65.6 issued under the Public Utility Code, 66 Pa.C.S. § § 317, 501, 1301, 1304, 1501, 1502, 1504, 1507, 1508, 1702 and 1704.
This section cited in 52 Pa. Code § 65.17 (relating to standards of design); and 52 Pa. Code § 65.18 (relating to standards of construction).