3.—(1) The register shall be so indexed as to enable information relating to a particular discharge or to a particular place to be traced and the index may contain a map.
(2) Subject to regulation 7(3), entries shall be made within 28 days of the relevant event.
(3) Every entry contained in the register shall state the date on which that entry was first included in the register.
(4) Where particulars of any place are required by these Regulations to be included in an entry in the register, those particulars shall include the map reference of the place (or of a point within that place) unless the place is otherwise readily identifiable.
(5) Entries shall be kept in the register for a period of five years from their date of entry; and thereafter for so long as the information provided by the entry may be necessary for the exercise of the Authority’s functions in respect of the control of pollution.