Section 17

of an offence under section 165 or under sections 213 to 215 of the Penal Code 1871, or of any conspiracy to commit, or of any attempt to commit, or of any abetment of such an offence;

of an offence under this Act; or

of any arrestable offence under any written law which may be disclosed in the course of an investigation under this Act,the Director or a special investigator may, without the order of the Public Prosecutor, exercise all or any of the powers in relation to police investigations into any offence given by the Criminal Procedure Code 2010:Provided that an investigation into an offence under the Penal Code 1871 shall be deemed to be a police investigation to which sections 23 and 258 of the Criminal Procedure Code 2010 shall apply in the same manner and to the same extent as if the Director or the special investigator concerned were a police officer.