368.This paragraph deals with unintelligible information which is or is likely to be obtained by certain agencies (other than the intelligence services) under statutory powers but not under a warrant issued by the Secretary of State or judicial authority. This includes, for example, material obtained by the police under powers conferred by section 19 of PACE.
369.The effect of Sub-paragraph (2) is that senior officers of the police, customs and excise and armed forces (as described in Paragraph 6) may authorise the service of a written notice in relation to material to which this paragraph applies.
370.The effect of sub-paragraph (3) is that where material to which this paragraph applies is obtained by agencies other than those described in Sub-paragraph (2), authority to serve a written notice is to be given by a judge, provided that the stipulations set out in Sub-paragraph (4) are complied with.
Other Authorisations Schedule 2:  Persons Having the Appropriate Permission Paragraph 4: Data obtained under statute by other persons but without a warrant