A district or London borough council on whom an operations notice is served in accordance with section 35(5) shall—
(a) within 7 days of receipt of the notice serve a copy of it (together with the certificate and any other documents accompanying the notice)—
(i) on the investigating authority appointed for the relevant area of archaeological importance; or
(ii) where no particular authority is so appointed, on the Historic Buildings and Monuments Commission for England as respects a site in England, or on the Secretary of State for Wales as respects a site in Wales; and
(b) if the operations described in the notice are to be carried out after clearance of the site, advise the developer in writing within 14 days of receipt of the notice of the name and address of the relevant investigating authority and of his duty under section 35(7) of the Act to notify the investigating authority of the clearance of the site immediately on completion of the clearance operations.