Since the economic crisis of the late 1990s in East Asia, one of the serious concerns in the minds of foreign investors in Asia relates to foreign exchange risk. The revenues generated from the services provided by infrastructure projects are primarily in won. Therefore, the Government has undertaken initiatives to limit the investor's risk from foreign exchange fluctuations. Where foreign exchange fluctuations exceed 20 per cent, up to 50 per cent of losses due to such fluctuations may be offset through modifications of tariff rates, government subsidies, adjustment of the concession period or other provisions.