Subpoenas for the attendance of witnesses or the production of evidence shall be issued upon request of any party, without notice to any other party. Requests for subpoenas must be submitted in writing to the Office of Administrative Law Judges. The party requesting the subpoena shall tender an original and one copy of such subpoena. Where it appears that the subpoena sought may be unreasonable, oppressive, excessive in scope, or unduly burdensome, the administrative law judge may in his or her discretion, as a condition precedent to the issuance of the subpoena, require the person seeking the subpoena to show the general relevance and reasonable scope of the testimony or other evidence sought. [Rule 131.]

(a) Except when issued at a hearing, or in connection with the taking of a deposition, within ten (10) days after service of a subpoena for attendance of a witness or a subpoena for production of evidence, but in any event at or before the time specified in the subpoena for compliance therewith, the person to whom the subpoena is directed may, by motion with notice to the party requesting the subpoena, petition the presiding officer to quash or modify the subpoena.

(b) If served at the hearing, the person to whom the subpoena is directed may, by oral application at the hearing, within a reasonable time fixed by the presiding officer, petition the presiding officer to revoke or modify the subpoena.

(c) If served in connection with the taking of a deposition pursuant to § 502.143 unless otherwise agreed to by all parties or otherwise ordered by the presiding officer, the party who has requested the subpoena shall arrange that it be served at least twenty (20) days prior to the date specified in the subpoena for compliance therewith, the person to whom the subpoena is directed may move to quash or modify the subpoena within ten (10) days after service of the subpoena, and a reply to such motion shall be served within seven (7) days thereafter. [Rule 132.]

Witnesses summoned by subpoena to a hearing or deposition are entitled to the same fees and mileage that are paid to witnesses in courts of the United States. Fees and mileage shall be paid, upon request, by the party at whose instance the witness appears. [Rule 133.]

If service of a subpoena is made by a United States marshal, or his or her deputy, or an employee of the Commission, such service shall be evidenced by his or her return thereon. If made by any other person, such person shall make affidavit thereto, describing the manner in which service is made, and return such affidavit on or with the original subpoena. In case of failure to make service, the reasons for the failure shall be stated on the original subpoena. In making service, the original subpoena shall be exhibited to the person served, shall be read to him or her if he or she is unable to read, and a copy thereof shall be left with him or her. The original subpoena, bearing or accompanied by required return, affidavit, or statement, shall be returned without delay to the Commission, or if so directed on the subpoena, to the presiding officer before whom the person named in the subpoena is required to appear. [Rule 134.]

(a) A subpoena for the attendance of Commission staff personnel or for the production of documentary materials in the possession of the Commission shall be served upon the Secretary. If the subpoena is returnable at hearing, a motion to quash may be filed within seven (7) days of service and attendance shall not be required until the presiding officer rules on said motion. If the subpoena is served in connection with prehearing depositions, the procedure to be followed with respect to motions to quash and replies thereto will correspond to the procedures established with respect to motions and replies in § 502.132(c).

(b) The General Counsel shall designate an attorney to represent any Commission staff personnel subpoenaed under this section. The attorney so designated shall not thereafter participate in the Commission's decision-making process concerning any issue in the proceeding.

(c) Rulings of the presiding officer issued under § 502.135(a) shall become final rulings of the Commission unless an appeal is filed within ten (10) days after date of issuance of such rulings or unless the Commission, on its own motion, reverses, modifies, or stays such rulings within twenty (20) days of their issuance. Replies to appeals may be filed within ten (10) days. No ruling of the presiding officer shall be effective until twenty (20) days from date of issuance unless the Commission otherwise directs. [Rule 135.]

In the event of failure to comply with any subpoena or order issued in connection therewith, the Commission may seek enforcement as provided in § 502.150(b). [Rule 136.]