S. 255 : Appellate Tribunal-Procedure-Functions-Conflict of interest-CIT-DR is not empowered to file additional grounds of appeal or miscellaneous application including application raising preliminary objection without consent of Assessing Officer-Application of CIT-DR alleging ‘conflict of interest’ was frivolous and mischievous-Department is advised to provide proper training to him before assigning him to a judicial forum-Tribunal is not right place to disqualify a lawyer or law firm as a regulatory measure; such matters could be dealt with by appropriate bodies like Bar Council of India (BCI).[S. 253]