(1) Where any revenue or police officer has reasonable cause to believe that any offence has been or is being committed with respect to an explosive in any place (whether a building or not, or a carriage, boat, or vessel), or that any explosive is in any such place in contravention of any order of the Governor General, or that the terms and conditions of any such order are not duly observed in any such place, such officer may apply to a magistrate or a justice of the peace for a warrant (which warrant such magistrate or justice shall grant upon reasonable ground being assigned upon oath) to search the said place and every part thereof, and on obtaining such warrant, and on producing the same, if demanded, such officer may enter at any time, and, if need be, by force, and as well on Sundays as on other days, the said place and every part thereof, and examine the same and search for explosives therein, and take samples of any explosive and ingredient of an explosive therein, and any substance reasonably supposed to be an explosive or such ingredient which may be found therein.