The Blackdown Hills have, since 1991, been designated as an Area of Outstanding Natural Beauty (AONB). As they have the same landscape quality, AONBs may be compared to the national parks of England and Wales. AONBs are created under the same legislation as the national parks: the National Parks and Access to the Countryside Act 1949. However, National Parks, unlike AONBs, have their own authorities and have special legal powers to prevent unsympathetic development. By contrast, there are very limited statutory duties imposed on local authorities within an AONB. Further regulation and protection of AONBs was added by the Countryside and Rights of Way Act 2000.