s 226DC Part 7A : interpretation
(1) In this Part— “ category authorisation ” has the meaning given by section 226BA (1) ; “ individual authorisation ” has the meaning given by section 226B (1) . (2) See also— section 199 (bulk personal datasets: interpretation), section 263 (general definitions), section 265 (index of defined expressions). (3) For the purposes of this Part, only a person holding office under the Crown may act on behalf of the head of an intelligence service.