(5)The authorised officer may requisition the services of,—(a)any police officer or any officer of the Central Government, or of both; or(b)any person or entity as may be approved by the Principal Chief Commissioner or the Chief Commissioner or the Principal Director General or the Director General, in accordance with such procedure, as may be prescribed, in this regard, to assist him for all or any of the purposes specified in sub-sections (1) and (3) and it shall be the duty of every such officer or person or entity to comply with such requisition.