2.—(1) A relevant authority shall provide a district council with all such information as is reasonably requested by the council for purposes connected with the carrying out of its functions under this Part.
(2) A district council shall provide a relevant authority with all such information as is reasonably requested by the authority for purposes connected with the carrying out of any of its functions relating to the assessment or management of the quality of air.
(3) Information provided to a district council or relevant authority under sub-paragraph (1) or (2) shall be provided in such form and in such manner and at such times as the council or, as the case may be, the authority may reasonably require.
(4) A relevant authority or district council which provides information under sub-paragraph (1) or (2) shall be entitled to recover the reasonable cost of doing so from the council or authority which requested the information.
(5) The information which a relevant authority or a district council may be required to provide under this paragraph shall include information which, although it is not in the possession of the authority or the council, is information which it is reasonable to require the authority or the council to obtain.