Hearings pursuant to order of the court and concerning the removal
of officers under section 402(b) of the Act shall be for the purpose of
introducing testimony and evidence showing why an officer or officers
accused of serious misconduct should or should not be removed. Hearings
shall be conducted by the officers of the labor organization (subject to
Sec. 417.19) in accordance with the constitution and bylaws of the labor
organization insofar as they are not inconsistent with title IV of the
Act, or with the provisions of this part 417: Provided, however, That no
officer(s) accused of serious misconduct shall participate in such
hearings in any capacity except as witness or counsel.