Economy of Devon of the railways in the 19th century, Devon's economy has been heavily reliant on tourism. The county's economy has followed the declining trend of British seaside resorts since the mid 20th century, with some recent revival. This revival has been aided by the designation of much of Devon's countryside and coastline as the Dartmoor and Exmoor national parks, and the Jurassic Coast and Cornwall and West Devon Mining Landscape World Heritage Sites. In 2004 the county's tourist revenue was £1.2 billion. The Met Office is in Exeter as is Connaught plc, and Pennon Group, the water company. The Wrigley Company
Operational Guidelines for the Implementation of the World Heritage Convention OUV. (paragraph 154-157) If the decision is not to inscribe, the property may not be presented again. When additional information is needed the nomination will be referred (para 159) or deferred (para 160) for more in depth assessment or study. The Guidelines also reveal when conditions for deletion (Chapter IV.C ) of a World Heritage Site apply. e.g. Dresden Elbe Valley, and what steps are to be taken to ensure for the long-term protection and conservation of UNESCO sites. To make sure that a World Heritage Site is protected and transmitted to future generations, the Operational Guidelines give directions to