62(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.