(a) General policy and protective orders. The parties are encouraged to engage in voluntary discovery procedures. In connection with any discovery procedure permitted under this part, the presiding officer may issue any order which justice requires to protect a party or person from annoyance, embarrassment, oppression, or undue burden or expense. Such orders may include limitations on the scope, method, time and place for discovery, and provisions for protecting confidential information or documents from unwarranted public disclosure. Each party shall bear its own expenses relating to discovery.

(b) Depositions. (1) After the issuance of a notice of hearing described in § 964.3 of this part, the parties may mutually agree to, or the presiding officer may, upon application of either party and for good cause shown, order the taking of testimony of any person by deposition upon oral examination or written interrogatories before any officer authorized to administer oaths at the place of examination, for use as evidence or for purposes of discovery. The application for order shall specify whether the purpose of the deposition is discovery or for use as evidence, or both.

(2) The time, place, and manner of taking depositions shall be as mutually agreed by the parties, or failing such agreement, governed by order of the presiding officer.

(3) No testimony taken by depositions shall be considered as part of the evidence in the hearing unless and until such testimony is offered and received in evidence at such hearing. Depositions will not ordinarily be received in evidence if the deponent is present and can testify personally at the hearing. In such instances, however, the deposition may be used to contradict or impeach the testimony of the witness given at the hearing. In cases submitted on the record, the presiding officer may, in his discretion, receive depositions as evidence in supplementation of the record.

(c) Interrogatories to parties. Not later than 5 days after the filing of the Answer described in § 964.3, a party may serve on the other party written interrogatories to be answered separately in writing, signed under oath and returned within 10 days. Upon timely objection by the party, the presiding officer will determine the extent to which the interrogatories will be permitted.

(d) Admission of facts. Not later than 5 days after the filing of the Answer described in § 964.3, a party may serve upon the other party a request for the admission of specified facts. Within 10 days after receipt of the request for admissions, the party served shall admit or answer each specified fact or file objections thereto. Any factual propositions set out in the request to which a party fails to respond shall be deemed admitted.

(e) Production and inspection of documents. Upon motion of any party showing good cause therefor, and upon notice, the presiding officer may order the other party to produce and permit the inspection and copying or photographing of any designated documents and or objects, provided that such documents and objects are not privileged, their relevance to the cause or causes in issue is explained, and they are reasonably calculated to lead to the discovery of admissible evidence. If the parties cannot themselves agree thereon, the presiding officer shall specify the terms and conditions for making the inspection and taking the copies and photographs.