(1) Section 174 of the 2002 Act (investigation powers) is amended as follows.
(2) For subsections (1) and (2) substitute -
"(1) For the purposes of this section, the permitted purposes are the following -
(a) assisting the CMA in carrying out its functions under section 5 in relation to a matter in a case where it has published a market study notice;
(b) assisting the CMA in carrying out any functions, including enforcement functions, exercisable by it under or by virtue of this Part in connection with a matter that is or has been the subject of a reference under section 131 or 132 or possible reference under section 131;
(c) assisting the CMA or the Secretary of State in carrying out any functions, including enforcement functions, of the CMA or (as the case may be) the Secretary of State under or by virtue of this Part in connection with a matter that is or has been the subject of a reference under section 140A(6) or possible reference under section 140A(5) or (6).
(2) The CMA may exe
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