10.69—Representation; ex parte communication.
        
        (a) Representation.
        
        (1) 
         The
Director of the Office of Professional
Responsibility may be represented in proceedings
under this part by an attorney or other employee
of the Internal Revenue Service. An attorney or an
employee of the Internal Revenue Service
representing the Director of the Office of
Professional Responsibility in a proceeding under
this part may sign the complaint or any document
required to be filed in the proceeding on behalf
of the Director of the Office of Professional
Responsibility.
    
    
        
        (2) 
         A respondent may appear in person, be
 represented by a practitioner, or be represented
 by an attorney who has not filed a declaration
 with the Internal Revenue Service pursuant to  §
 10.3. A practitioner or an attorney representing a
 respondent or proposed respondent may sign the
 answer or any document required to be filed in the
 proceeding on behalf of the respondent.
    
    
        
        (b) Ex parte communication.
         The
 Director of the Office of Professional
 Responsibility, the respondent, and any
 representatives of either party, may not attempt
 to initiate or participate in ex
 parte discussions concerning a proceeding or
 potential proceeding with the Administrative Law
 Judge (or  any person who is
 likely to advise the Administrative Law Judge on a
 ruling or decision) in the proceeding before or
 during the pendency of the proceeding. Any
 memorandum, letter or other communication
 concerning the merits of the proceeding, addressed
 to the Administrative Law Judge, by or on behalf
 of any party shall be regarded as an argument in
 the proceeding and shall be served on the other
 party.