(1)    If it appears to the Investigating Authority—

(a)    that there are reasonable grounds for suspecting that an offence to which this Chapter applies has been committed,

(b)    that any person has information (whether or not contained in a document) which relates to a matter relevant to the investigation of that offence, and

(c)    that there are reasonable grounds for believing that information which may be provided by that person in compliance with a disclosure notice is likely to be of substantial value (whether or not by itself) to that investigation,

he may give, or authorise an appropriate person to give, a disclosure notice to that person.

(2)    In this Chapter “appropriate person” means—

(a)    a constable,

(b)    a member of the staff of SOCA who is for the time being designated under section 43, or

(c)    an officer of Revenue and Customs.

(3)    In this Chapter “disclosure notice” means a notice in writing requiring the person to whom it is given to do all or any of the following things in accordance with the specified requirements, namely—

(a)    answer questions with respect to any matter relevant to the investigation;

(b)    provide information with respect to any such matter as is specified in the notice;

(c)    produce such documents, or documents of such descriptions, relevant to the investigation as are specified in the notice.

(4)    In subsection (3) “the specified requirements” means such requirements specified in the disclosure notice as relate to—

(a)    the time at or by which,

(b)    the place at which, or

(c)    the manner in which,

the person to whom the notice is given is to do any of the things mentioned in paragraphs (a) to (c) of that subsection; and those requirements may include a requirement to do any of those things at once.

(5)    A disclosure notice must be signed or counter-signed by the Investigating Authority.

(6)    This section has effect subject to section 64 (restrictions on requiring information etc).