(1) When any officer in charge of a police station or any police officer making an investigation under Chapter XIII requires any officer subordinate to him to arrest without a warrant (otherwise than in his presence) any person who may lawfully be arrested without a warrant, he shall deliver to the officer required to make the arrest an order in writing, specifying the person to be arrested and the offence or other cause for which the arrest is to be made and the officer so required shall, before making the arrest, notify to the person to be arrested the substance of the order and, if so required by such person, shall show him the order.
(2) Nothing in sub-section (1) shall affect the power of a police officer to arrest a person under section 35.
Legal Commentary & Landmark Judgments: Section 55
Section 55 prescribes the mandatory procedure when an officer in charge of a police station or an investigating officer deputes a subordinate police officer to arrest any person without a warrant.
In cross-examination of the arresting head constable or constable, call for the written order under Section 55. If the subordinate admits arresting the client purely on 'oral phone instructions' without written order, the arrest is illegal.