Except for proceedings involving an appeal of a Postal Service determination to close or consolidate a post office, any person may submit comments in proceedings before the Commission. An opportunity to provide a reply to comments shall be at the discretion of the Commission, or the presiding officer if one is appointed. The scope and timing of comments and reply comments may be specified by notice, order, or presiding officer's ruling. There is no requirement to intervene in a proceeding as a party in order to submit comments.

(a) Only a person served by the post office in which the Postal Service has issued a decision to close or consolidate a post office may file an appeal of the decision with the Commission.

(b) Any other person served by the same post office under review who desires to participate in the proceeding, or any Postmaster, counsel, agent, or other person authorized or recognized by the Postal Service as such person's representative, may participate in an appeal by submitting comments.

(c) Except for persons identified in paragraph (a) or (b) of this section, the designated Public Representative, and the Postal Service, no other person may participate in a proceeding to consider the appeal of a Postal Service determination to close or consolidate a post office.

(d) Opposition to a person asserting eligibility for participation shall be made within three days of that person's first filing in the proceeding.

(a) Parties to a proceeding. Any interested person may become a party to proceedings docketed for a hearing on the record by filing a notice of intervention. The Postal Service, and the Public Representative are automatically deemed parties in such proceedings without the need to file a notice of intervention. Persons who file a complaint are also automatically deemed a party to a complaint proceeding without the need to file a notice of intervention. Parties may be provided an opportunity to participate in discovery, file testimony, participate in the written or oral examination of witnesses, file briefs, or present oral argument before the Commission or the presiding officer. Persons that have not intervened may participate in a proceeding docketed for a hearing on the record, but such participation shall be limited to providing comments pursuant to § 3010.140 unless otherwise directed.

(b) Notices of intervention. A notice of intervention shall clearly and concisely set forth the nature and extent of the intervenor's interest in the issues to be decided, including the postal services utilized by the intervenor giving rise to the intervenor's interest in the proceeding, and to the extent known, the position of the intervenor with regard to the proposed changes in postal rates, fees, classifications, or services, or the subject matter of the complaint, as described in the notice of the proceeding. Such notice shall state whether or not the intervenor requests a hearing or in lieu thereof, a conference, and whether or not the intervenor intends to actively participate in a hearing. Such notice shall also include on page one thereof the name and full mailing address of no more than two persons who are to receive service, when necessary, of any documents relating to such proceeding.

(c) Form and time of filing. Notices of intervention shall be filed no later than the date fixed for such filing by the Commission or its Secretary, unless for good cause shown, the Commission authorizes a late filing. Without a showing for good cause, late intervenors shall be subject to and may not challenge decisions by the Commission or presiding officer made prior to acceptance of the request for late intervention.

(d) Oppositions. (1) Except as otherwise provided in paragraph (d)(2) of this section, oppositions to notices of intervention may be filed by any party in the proceeding no later than ten days after the notice of intervention is filed.

(2) Oppositions to notices of interventions in proceedings considering the change in the nature of a postal service pursuant to part 3020 of this chapter may be filed by any party in the proceeding no later than three days after the notice of intervention is filed.

(3) Pending Commission action, an opposition to intervention shall, in all proceedings except those considering the change in the nature of a postal service pursuant to part 3020 of this chapter, delay on a day-for-day basis the date for responses to discovery requests filed by that intervenor.

(e) Effect of intervention. A person filing a notice of intervention shall be a party to the proceeding subject, however, to a determination by the Commission, either in response to an opposition, or sua sponte, that party status is not appropriate under the Act. Intervenors are also subject to the right of the Commission or the presiding officer as specified in § 3010.104 to require two or more intervenors having substantially like interests and positions to join together for purposes of service of documents, presenting evidence, making and arguing motions and objections, propounding discovery, cross-examining witnesses, filing briefs, and presenting oral arguments to the Commission or presiding officer. No intervention shall be deemed to constitute a decision by the Commission that the intervenor is aggrieved for purposes of perfecting an appeal of any final order of the Commission.

(a) By whom. An individual may participate on the individual's own behalf; a member of a partnership may represent the partnership; and an officer may represent a corporation, limited liability company, trust, unincorporated association, or governmental entity. A person may be represented in a proceeding by an attorney at law admitted to practice and in good standing before the Supreme Court of the United States, the highest court of any State or Territory of the United States or the District of Columbia, or the Court of Appeals or the District Court for the District of Columbia.

(b) Authority to act. When an officer or an attorney acting in a representative capacity appears in person, submits a document to the Commission using the Filing Online system as a principal account holder, or signs a paper filed with the Commission, the personal appearance, online submission, or signature, shall constitute a representation to the Commission that that individual is authorized to represent the particular person on whose behalf the individual acts. Any individual appearing before or transacting business with the Commission in a representative capacity may be required by the Commission or the presiding officer to file evidence of the individual's authority to act in such capacity.

(c) Notice of appearance and withdrawal of appearance. An individual intending to appear before the Commission or its presiding officer in a representative capacity in a proceeding before the Commission shall file with the Commission a notice of appearance in the form prescribed by the Secretary unless that individual is named in an initial filing of the person whom the individual represents as the individual to whom communications from the Commission in regard to the filing are to be addressed. An individual whose authority to represent a person in a specific Commission proceeding has been terminated shall file a timely notice of withdrawal of appearance with the Commission.

(d) Standards of conduct. Individuals practicing before the Commission shall conform to the standards of ethical conduct required of practitioners by the District of Columbia Rules of Professional Conduct.

(e) Disqualification and suspension. After hearing, the Commission may disqualify and deny, temporarily or permanently, the privilege of appearing and practicing before it in any way to any individual who is found not to possess the requisite qualifications, or to have engaged in unethical or improper professional conduct. Contumacious conduct at any hearing before the Commission or its presiding officer shall be grounds for exclusion of any individual from such hearing and for summary suspension for the duration of the hearing by the Commission or the presiding officer.

No officer, employee, or agent of the Commission who participates in a proceeding before the Commission as an attorney or witness or who actively participates in the preparation of evidence or argument presented by such persons, shall participate or advise as to the intermediate decision or Commission decision in that proceeding.