If ingress into a building or place cannot be obtained as specified in rule 6, it shall be lawful for the authorised officer executing the authorisation, with such assistance of police officers or of officers of the Central Government, or of both, as may be required, to enter such building or place and search therein, and in order to effect an entrance into such building or place, to break open any outer or inner door or window of the building or place, if after the disclosure of authorisation and the purpose and demand of admittance duly made, he cannot otherwise obtain admittance:
Provided that, if any such building or place is an apartment in actual occupancy of a woman, who according to custom does not appear in public, the authorised officer shall, before entering such apartment, give notice to such woman that she is at liberty to withdraw and shall afford her every reasonable facility for withdrawing and may then break open the apartment and enter it.