(1)For the purposes of this section the 1973 Act functions are the functions mentioned in subsection (2) of section 86 which, by virtue of that section, are concurrent functions of the CAA and the Director.
(2)Before the Director or the CAA first carries out the 1973 Act functions in relation to a matter he or it must consult the other.
(3)If the Director or the CAA has carried out the 1973 Act functions in relation to a matter the other must not carry out the 1973 Act functions in relation to the matter.
(4)If in carrying out the 1973 Act functions the CAA makes a reference to the Competition Commission, to help the Commission in its investigation on the reference the CAA must give to it—
(a)any information the CAA has which relates to matters within the scope of the investigation and which the Commission requests;
(b)any information the CAA has which relates to matters within the scope of the investigation and which the CAA thinks it would be appropriate for it to give without a request;
(c)any other help which the CAA is able to give in relation to matters within the scope of the investigation and which the Commission requests.
(5)In carrying out the investigation concerned the Commission must take account of any information given under subsection (4).