Pennsylvania Code
Title 52 - PUBLIC UTILITIES
Part I - Public Utility Commission
Subpart A - General Provisions
Chapter 5 - FORMAL PROCEEDINGS
Subchapter D - DISCOVERY
TIMING AND SUPPLEMENTAL RESPONSES
Section 5.331 - Sequence and timing of discovery

(a) A party to the Commission proceeding may conduct discovery.

(b) A party shall initiate discovery as early in the proceedings as reasonably possible. In a proceeding, the right to discovery commences when a complaint, protest or other adverse pleading is filed or when the Commission institutes an investigation or on the record proceeding, whichever is earlier.

(c) Commission staff may initiate discovery at an earlier time. Commission staff discovery prior to formal Commission action to initiate a proceeding shall be designated as "Staff data requests" and shall be answered fully and completely by the utility within the time periods specified in § 5.342(d) (relating to answers or objections to written interrogatories by a party). Unless a presiding officer has been designated, objections and motions to compel shall be ruled upon by the Chief Administrative Law Judge.

(d) In a rate proceeding, initial discovery directed to data or information supplied by the public utility at the time of the initiation of the proceeding shall be submitted to the utility within 10 working days following the first prehearing conference. The presiding officer may establish reasonable limitations upon the timing of discovery.

(e) Unless the presiding officer upon motion, for the convenience of parties and witnesses and in the interests of justice, orders otherwise, methods of discovery may be used in any sequence and the fact that a party is conducting discovery will not operate to delay another party's discovery.