20Powers of explosives inspectors
(1)An inspector appointed under section 53 of the [1875 c. 17.] Explosives Act 1875 may, for the purpose of ascertaining whether there is unlawfully in any premises or other place other than a dwelling-house any explosive or explosive substance, enter that place and search it with a view to exercising the powers conferred by subsection (3) below.
(2)Any such inspector may, with a view to exercising those powers, stop any person in a public place and search him for the purpose of ascertaining whether he has any explosive or explosive substance unlawfully with him.
(3)Any such inspector may seize any explosive or explosive substance found in the course of a search under this section unless it appears to him that it is being, has been and will be used only for a lawful purpose and may retain and, if necessary, destroy it.