(a) Discovery methods. Participants may obtain discovery by data requests, written interrogatories, and requests for production of documents or things (Rule 406), depositions by oral examination (Rule 404), requests for inspection of documents and other property (Rule 407), and requests for admission (Rule 408).

(b) Discovery conferences.

(1) The presiding officer may direct the participants in a proceeding or their representatives to appear for one or more conferences, either separately or as part of any other prehearing conference in the proceeding under Rule 601(a), for the purpose of scheduling discovery, identifying discovery issues, and resolving discovery disputes. Except as provided in paragraph (b)(2) of this section, the presiding officer, upon the conclusion of a conference, will issue an order stating any and all decisions made and agreements reached during the conference.

(2) The Chief Administrative Law Judge may, upon a showing of extraordinary circumstances, waive the requirement to issue an order under paragraph (b)(1) of this section.

(c) Identification and certification of preparer. Each response to discovery under this subpart must:

(1) Identify the preparer or person under whose direct supervision the response was prepared; and

(2) Be under oath or, for representatives of a public or private corporation or a partnership or association or a governmental agency, be accompanied by a signed certification of the preparer or person supervising the preparation of the response on behalf of the entity that the response is true and accurate to the best of that person's knowledge, information, and belief formed after a reasonable inquiry.

(d) Supplementation of responses.

(1) Except as otherwise provided by this paragraph, a participant that has responded to a request for discovery with a response that was complete when made is not under a continuing duty to supplement that response to include information later acquired.

(2) A participant must make timely amendment to any prior response if the participant obtains information upon the basis of which the participant knows that the response was incorrect when made, or though correct when made is now incorrect in any material respect.

(3) A participant may be required to supplement a response by order of the presiding officer or by agreement of all participants.

(4) A participant may request supplementation of prior responses, if such request is permitted under the procedural schedule.

[Order 225, 47 FR 19022, May 3, 1982, as amended by Order 466-A, 52 FR 35909, Sept. 24, 1987]