After a hearing the Commission may disqualify and deny, temporarily or permanently, the privilege of appearing or practicing before it in any way to a person who is found:
Not to possess the requisite qualifications to represent others, or
To have engaged in unethical or improper professional conduct, or
Otherwise to be not qualified.
Contumacious conduct in a hearing before the Commission or a presiding officer will be grounds for exclusion of any person from such hearing and for summary suspension for the duration of the hearing by the Commission or the presiding officer.