Power  of Principal Director General or Director General or  Principal Director or Director, Principal Chief  Commissioner or Chief Commissioner or Principal Commissioner or Commissioner and  Joint Commissioner.
 
135. The  Principal Director General or Director General or Principal Director or  Director, the Principal Chief Commissioner or Chief Commissioner or Principal  Commissioner or Commissioner and the Joint Commissioner shall be competent to  make any enquiry under this Act, and for this purpose shall have all the powers  that an Assessing Officer has under this Act in relation to the making of  enquiries.