§ 18.51 Discovery scope and limits.

(a) Scope in general. Unless otherwise limited by a judge's order, the scope of discovery is as follows: Parties may obtain discovery regarding any nonprivileged matter that is relevant to any party's claim or defense—including the existence, description, nature, custody, condition, and location of any documents or other tangible things and the identity and location of persons who know of any discoverable matter. For good cause, the judge may order discovery of any matter relevant to the subject matter involved in the proceeding. Relevant information need not be admissible at the hearing if the discovery appears reasonably calculated to lead to the discovery of admissible evidence. All discovery is subject to the limitations imposed by paragraph (b)(4) of this section.

(b) Limitations on frequency and extent—(1) When permitted. By order, the judge may alter the limits in these rules on the number of depositions and interrogatories or on the length of depositions under § 18.64. The judge's order may also limit the number of requests under § 18.63.

(2) Specific limitations on electronically stored information. A party need not provide discovery of electronically stored information from sources that the party identifies as not reasonably accessible because of undue burden or cost. On motion to compel discovery or for a protective order, the party from whom discovery is sought must show that the information is not reasonably accessible because of undue burden or cost. If that showing is made, the judge may nonetheless order discovery from such sources if the requesting party shows good cause, considering the limitations of paragraph (b)(4) of this section. The judge may specify conditions for the discovery.