61-UI. Updating of safety reports under rule 61-UH.- (I) Where an occupier has made a safety report in accordance with sub-rule (1) of rule 61-UH, he shall not make any modification to the industrial activity or isolated storage to which that safety report relates which could materially affect the particulars in that report, unless he has made a further report to take account of those modifications and has sent a copy of that report to the Inspector and Chief Inspector at least ninety days before making those modifications. (2) Where an occupier has made a report in accordance with rule 61UH and sub-rule (1) of this rule and that industrial activity or isolated storage is continuing, the occupier shall within three years of the date of the last such report make a further report which shall have regard in particular to new technical knowledge which has affected the particulars in the previous report relating to safety and hazard assessment, and shall within thirty days or in such longer times as the Chief Inspector may agree in writing, send a copy of the report to the Inspector and the Chief Inspector. | 
