(5)If a person,—(a)who is a legal practitioner or an accountant, is found guilty of misconduct in his professional capacity by any authority authorised to institute disciplinary proceedings against him, the order passed by that authority shall affect his right to attend before an income-tax authority in the same manner as it affects his right to practise as a legal practitioner or accountant, as the case may be;(b)who is not a legal practitioner or an accountant, and is found guilty of misconduct in any income-tax proceedings by the prescribed income-tax authority, he may be directed by such authority that he shall henceforth be disqualified from representing an assessee under sub-section (1).