Original sentence: Leaving some areas with very few vehicual rights of way as Section 47 onwards  of the CROW Act reclassified all remaining RUPPs as Restricted Byways on 2 May 2006.The "National Environment and Rural Communities" act (NERC) in 2006 stopped any further conversions of lower classified rights of way to BOAT status (ie no more vehicular rights of way could be created).This process involved extenisve research into historic usage and often public enquiries, and not every highway authrotiy completed the exercise by the time the Countryside and Rights of Way Act 2000 was passed
Edited sentence: Section 47 onwards  of the CROW Act reclassified all remaining RUPPs as Restricted Byways on 2 May 2006.This process was slow as it involved research into historic usage and often public enquiries, and so was not completed by the time the Countryside and Rights of Way Act 2000 was passed