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 detail precising their role, tasks, specific responsibilities, moreover meeting sessions, term of office, contact informations etc. A list of functions of the World Heritage Committee in cooperation with the States Parties is provided. Most functions derives from Articles 11(2+4+7), Article 13(6), Article 21(1+3) and Article 29(3) of the World Heritage Convention. In general the overall aim of the Convention and its Guidelines is to safeguard heritage of universal value for future generations. It is to give a guidance on how properties can be inscribed on the World Heritage List or/and the List of World Heritage in Danger if the properties