Discovery is generally not permitted. An Administrative Law Judge may authorize discovery for good cause shown, but interrogatories and depositions are disfavored.
A party may move for an Administrative Law Judge to issue a subpoena to require any non-party to provide documents prior to the hearing in accordance with §§ 2824, 2934, 2975, and 2984, as applicable.
Any motion for discovery shall explain the relevance of the information that is sought and shall describe all attempts to obtain consent from the opposing party, including a description of all discovery to which the opposing party has agreed.
Unless otherwise ordered by an Administrative Law Judge, any motion for discovery shall be filed at least twenty (20) calendar days before the date of any scheduled evidentiary hearing.
At an Administrative Law Judge's discretion, a witness may be allowed to offer opinion testimony even if the witness is not qualified by an Administrative Law Judge as an expert in a particular subject matter. A party wishing to present expert or other opinion testimony may disclose to the other parties in writing, a reasonable time prior to the witness's testimony, some or all of the following:
For good cause shown, including undue prejudice to a party, an Administrative Law Judge may limit, postpone, or refuse to allow expert or other opinion testimony. In deciding whether a witness may offer expert or other opinion testimony and in assessing how much weight to give to such testimony, an Administrative Law Judge may consider the adequacy, timing, or absence of the disclosures described in §§ 2821.6 as well as any failure to make an ordered disclosure.
D.C. Mun. Regs. tit. 1, r. 1-2821