A police officer of at least the rank of superintendent may by a written order signed by him give to any constable the authority which may be given by a search warrant under paragraph 28.

Where an order is made under this paragraph particulars of the case shall be notified as soon as is reasonably practicable to the Secretary of State.

If a police officer of at least the rank of superintendent has reasonable grounds for believing that the case is one of great emergency he may by a written notice signed by him require any person specified in the notice to provide an explanation of any material seized in pursuance of an order under paragraph 22.

Sub-paragraphs (2) and (3) of paragraph 30 shall apply to a notice under this paragraph as they apply to an order under that paragraph.

A person commits an offence if he fails to comply with a notice under this paragraph.

It is a defence for a person charged with an offence under sub-paragraph (3) to show that he had a reasonable excuse for his failure.

A person guilty of an offence under sub-paragraph (3) is liable on summary conviction to imprisonment for a term not exceeding six months, to a fine not exceeding level 5 on the standard scale or to both.