If a police officer of at least the rank of superintendent has reasonable grounds for believing that the case is one of great emergency and that in the interests of the State immediate action is necessary, he may by a written order signed by him give to any constable the authority which may be given by a search warrant under paragraph 14 above.

Where an authority is given under this paragraph particulars of the case shall be notified as soon as may be to the Secretary of State.

If such a police officer as is mentioned in sub-paragraph (1) above has reasonable grounds for believing that the case is such as is there mentioned he may by a notice in writing signed by him require any person specified in the notice to provide an explanation of any materials seized in pursuance of an order under this paragraph.

Any person who without reasonable excuse fails to comply with a notice under sub-paragraph (3) above is guilty of an offence and liable on summary conviction to imprisonment for a term not exceeding six months or a fine not exceeding level 5 on the standard scale or both.

Sub-paragraphs (2) and (3) of paragraph 15 above shall apply to a requirement under sub-paragraph (3) above as they apply to an order under that paragraph.