371.This paragraph deals with unintelligible information which is or is likely to come into the possession of an intelligence service, the police or customs and excise by any other lawful means not involving the exercise of statutory powers (e.g. material which has been voluntarily handed over).
372.The effect of Sub-paragraph (2) is to enable the Secretary of State to give his permission to serve a notice in relation to material, obtained by an intelligence service, falling under this paragraph.
Other Authorisations Schedule 2:  Persons Having the Appropriate Permission Paragraph 5: Data obtained without the exercise of statutory powers