§ 5.324. Discovery of expert testimony.
(a) Consistent with Pa.R.C.P. 4003.5 (relating to discovery of expert testimony trial preparation material), discovery of facts known and opinions held by an expert, otherwise discoverable under § 5.321 (relating to scope), including that acquired or developed in anticipation of litigation or for hearing, may be obtained as follows:
(1) A party may through interrogatories require both of the following:
(i) That the other party identify each person whom the party expects to call as an expert witness at hearing and to state the subject matter on which the expert is expected to testify.
(ii) That the other party have each expert so identified state the substance of the facts and opinions to which the expert is expected to testify and a summary of the grounds for each opinion. The party answering the interrogatories may file as the answer a report of the expert, have the interrogatories answered by the expert or provide written direct testimony of the expert. The answer, separate report or testimony shall be signed by the expert and shall be deemed to be provided under oath in accordance with section 333(d) of the act (relating to prehearing procedures).
(2) If the party against whom discovery is sought, under paragraph (1)(ii), responds by the filing of written direct testimony, the response shall be considered timely, regardless of § 5.342 (relating to answers or objections to written interrogatories by a party), if the written direct testimony is served on all parties at least 20 days prior to the date on which the expert is scheduled to testify or in accordance with the schedule for the submission of written testimony established by the presiding officer. However, the party shall still comply with paragraph (1)(i) within the time otherwise applicable.
(3) Upon cause shown, the presiding officer may order further discovery by other means, subject to restrictions as to scope and provisions concerning fees and expenses as he may deem appropriate.
(b) An expert witness whose identity is not disclosed in compliance with subsection (a)(1) will not be permitted to testify on behalf of the defaulting party at hearing. If the failure to disclose the identity of the witness is the result of extenuating circumstances beyond the control of the defaulting party, the presiding officer may grant a continuance or other appropriate relief.
(c) To the extent that the facts known or opinions held by an expert have been developed in discovery proceedings under subsection (a), the expert’s direct testimony at hearing may not be inconsistent with or go beyond the fair scope of his testimony in the discovery proceedings as set forth in his deposition, answer to an interrogatory, separate report, written direct testimony or supplement thereto. The expert will not be prevented from testifying as to facts or opinions on matters on which he has not been interrogated in the discovery proceedings.
(d) The answering party may supplement answers only to the extent that facts, or opinions based on those facts, can reasonably be shown to have changed after preparation of the answer or when additional facts or information have become known to the answering party or when the interest of justice otherwise requires.
(e) Subsections (a)—(d) supersede 1 Pa. Code § 35.152 (relating to fees of officers and deponents).
Authority The provisions of this § 5.324 amended under the Public Utility Code, 66 Pa.C.S. § § 501, 504—506, 1301 and 1501.
Source The provisions of this § 5.324 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 pages (225683) to (225684).
Cross References This section cited in 52 Pa. Code § 5.324 (relating to discovery of expert testimony); 52 Pa. Code § 5.332 (relating to supplementing responses); 52 Pa. Code § 5.341 (relating to written interrogatories to a party); 52 Pa. Code § 5.344 (relating to approval by presiding officer); 52 Pa. Code § 5.349 (relating to requests for documents, entry for inspection and other purposes); 52 Pa. Code § 5.350 (relating to request for admissions); and 52 Pa. Code § 5.411 (relating to oral examination).
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