52 Pa. Code § 1.21
(c) In nonadversarial proceedings, persons may be represented in the following manner:
(d) In informal proceedings brought under Chapters 56 and 64 (relating to standards and billing practices for residential utility service; and standards and billing practices for residential telephone service) and Chapter 14 of the act (relating to standards and billing practices for residential utility service; and standards and billing practices for residential telephone service), parties may be represented by one of the following:
The provisions of this § 1.21 amended under the Public Utility Code, 66 Pa.C.S. § § 501, 504—506, 1301 and 1501.
The provisions of this § 1.21 adopted October 12, 1984, effective January 1, 1985, 14 Pa.B. 3819; amended January 24, 1997, effective January 25, 1997, 27 Pa.B. 414; amended April 28, 2006, effective April 29, 2006, 36 Pa.B. 2097. Immediately preceding text appears at serial page (225558).
This section cited in 52 Pa. Code § 1.22 (relating to appearance by attorney or certified legal intern); 52 Pa. Code § 1.23 (relating to other representation prohibited at hearings); and 52 Pa. Code § 63.322 (relating to definitions).