(6)The Appellate Tribunal shall, for the purpose of discharging its functions, have all the powers which are vested in the income-tax authorities referred to in section 131, and any proceeding before the Appellate Tribunal shall be deemed to be a judicial proceeding within the meaning of sections 193 and 228 and for the purpose of section 196 of the Indian Penal Code (45 of 1860), and the Appellate Tribunal shall be deemed to be a civil court for all the purposes of section 195 and Chapter XXXV of the Code of Criminal Procedure, 1898 (5 of 1898).