Section 170.   Arrest to prevent commission of cognizable offences.

(1) A police officer knowing of a design to commit any cognizable offence may
arrest, without orders from a Judicial Magistrate and without a warrant, the person so
designing, if it appears to such officer that the commission of the offence cannot be otherwise
prevented.
(2) No person arrested under sub-section (1) shall be detained in custody for a period
exceeding twenty-four hours from the time of his arrest unless his further detention is
required or authorised under any other provisions of this Sanhita or of any other law for the
time being in force.