(4) If ingress to such place cannot be obtained under sub-section (3) of this section it shall be lawful in any case for a person acting under a warrant and in any case in which warrant may issue but cannot be obtained without affording the person to be arrested an opportunity of escape from a police officer, to enter such place and search therein and in order to effect an entrance into such place to break open any outer or inner door or window of any place whether that of the person to be arrested or of any other person if, after notification of his authority and purpose and demand of admittance duly made, he cannot otherwise obtain admittance.
(5) Any police officer or other person authorised to make an arrest may break open any place in order to liberate himself or any other person who having lawfully entered for the purpose of making an arrest is detained therein.
(6) Where any person is apprehended by a police officer it shall be lawful for such officer to search for and take possession of any newspaper book or other document or any portion or extract therefrom and any other article or chattel which may be found on his person or in or about the place at which he has been apprehended and which the said officer may reasonably suspect of throwing light on the character or activities of such person or his associates: Provided that nothing in this sub-section shall be construed in diminution of the powers of search conferred by any particular warrant.
(7) Whenever it appears to a magistrate upon the oath of any person that there is reasonable cause to suspect that there is in any building vessel (not being a ship of war or a ship having the status of a ship of war) or place any newspaper book or other document, or any portion or extract thereform, or any other article or chattel which may throw light on the character or activities of any person liable to apprehension under this section or on the character or activities of the associates of any such person, such magistrate may by warrant directed to any police officer empower him with such assistants as may be necessary by day or by night—
- (a) to enter and if necessary to break into or forcibly enter such building vessel or place and to search for and take possession of any such newspaper book or other document or portion of or extract therefrom or any such other article or chattel which may be found therein, and
