(a) Applicability. The discovery rules established in this subpart are applicable to the discovery of information among the parties to a proceeding. Parties seeking information from persons not parties may do so by subpoena in accordance with § 511.38.

(b) Discovery methods. Parties may obtain discovery by one or more of the following methods: (1) Written interrogatories; (2) requests for production of documents or things; (3) requests for admissions; or (4) testimony upon oral examination. Unless the Presiding Officer otherwise orders under paragraph (d) of this section, the frequency of use of these methods is not limited.

(c) Scope of discovery. The scope of discovery is as follows:

(1) In general. Parties may obtain discovery regarding any matter not privileged, which is relevant to the subject matter involved in the proceedings, whether it relates to the claim or defense of the party seeking discovery or to the claim or defense of any other party. It is not ground for objection that the information sought will be inadmissible at the hearing if the information sought appears reasonably calculated to lead to the discovery of admissible evidence.

(2) Exception. Parties may not obtain discovery of documents which accompanied the staff's recommendation as to whether a complaint should issue or of documents or portions thereof which would be exempt from discovery under Rule 26(b)(3) of the Federal Rules of Civil Procedure.

(3) Hearing preparation: Experts. A party may obtain discovery of facts known and opinions held by experts, regardless of whether they are acquired or developed in anticipation of or for litigation. Such discovery may be had by any of the methods provided in paragraph (b) of this section.

(d) Protective orders. Upon motion by a party or person and for good cause shown, the Presiding Officer may make any order which justice requires to protect such party or person from annoyance, embarrassment, competitive disadvantage, oppression or undue burden or expense, including one or more of the following: (1) That the discovery shall not be had; (2) that the discovery may be had only on specified terms and conditions, including a designation of the time and/or place; (3) that the discovery shall be had only by a method of discovery other than that selected by the party seeking discovery; (4) that certain matters shall not be inquired into, or that the scope of discovery shall be limited to certain matters; (5) that discovery shall be conducted with no one present except persons designated by the Presiding Officer; (6) that a trade secret or other confidential research, development, or commercial information shall not be disclosed or shall be disclosed only in a designated way or only to designated parties; and (7) that responses to discovery shall be placed in camera in accordance with § 511.45.

(e) Sequence and timing of discovery. Discovery may commence at any time after filing of the answer. Unless otherwise provided in these Rules or by order of the Presiding Officer, methods of discovery may be used in any sequence and the fact that a party is conducting discovery shall not operate to delay any other party's discovery.

(f) Supplementation of responses. A party who has responded to a request for discovery shall supplement the response with information thereafter acquired.

(g) Completion of discovery. All discovery shall be completed as soon as practical but in no case longer than one hundred fifty (150) days after issuance of a complaint unless otherwise ordered by the Presiding Officer in exceptional circumstances and for good cause shown. All discovery shall be served by a date which affords the party from whom discovery is sought the full response period provided by these Rules.

(h) Service and filing of discovery. All discovery requests and written responses, and all notices of the taking of testimony, shall be filed with the Docket Section and served on all parties and the Presiding Officer.

(i) Control of discovery. The use of these discovery procedures is subject to the control of the Presiding Officer, who may issue any just and appropriate order for the purpose of ensuring their timely completion.