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 June - 1 July) in Paris. The Drafting Committee and the World Heritage Committee prepared the text. It contained four chapters and twenty-eight paragraphs. In October same year, the Operational Guidelines for the Implementation of the World Heritage with 27 paragraphs followed. A year later, at the Second Session of the Intergovernmental Committee for the Protection of the World Cultural and Natural Heritage, the Operational Guidelines was adopted with 30 paragraphs. The World Heritage Committee, the main body responsible for the Implementation of the World Heritage Convention, has revised its text ever since adding paragraphs updating it with new concepts,