There is no positive distinction yet for a single method of registering sites of heritage. The long tradition of legal issues did not lead to a condensed register nor to any single authority to take care of over the course of the last 130 years. The UK is a signatory to the
Council of Europe's
Valletta Treaty which obliges it to have a legal system to protect archaeological heritage on land and under water. There have been many revisions since, and the UK government states that it remains committed to heritage protection legislation reform, even though the draft Heritage Protection Bill 2008, which proposed a single 'register' that included scheduled monuments and listed buildings, was abandoned to make room in the parliamentary legislative programme for measures to deal with the credit crunch. The scheduling system has been criticised by some as being cumbersome. The wide range of legislation means that the terminology describing how historic sites are protected varies according to the type of heritage asset. Monuments are "scheduled", buildings are "listed", whilst battlefields, parks and gardens are "registered", and historic wrecks are "protected". Historic urban spaces receive protection through designation as "
conservation areas", and historic landscapes are designated through
national park and
Area of Outstanding Natural Beauty (AONB) legislation. In addition, there are areas in the UK are also protected as
World Heritage Sites. To add to the confusion, some heritage assets can be both listed buildings and scheduled monuments (e.g.
Dunblane Cathedral). World Heritage Sites, conservation areas and protected landscapes can also contain both scheduled monuments and listed buildings. although three maritime sites have been designated as scheduled monuments. In Scotland new powers for protection of the marine heritage, better integrated with other maritime conservation powers, have been given by the Marine (Scotland) Act 2010. It is intended that the marine scheduled monuments will be protected by this new Act. The Historic Environment (Amendment) (Scotland) Act, which amended the 1979 Act, was passed into law in 2011. Wider areas can be protected by designating their locations as Areas of Archaeological Importance (AAI) under the Ancient Monuments and Archaeological Areas Act 1979. This part of the 1979 Act was never brought into effect in Scotland. ==The schedules==