64. Firms are required to holdone allowance for each ton of sulfur dioxide they emit.
65. Firms are allowed to transfer allowances among facilities or to other firms or to bank them for use in future years. SO2 Allowances Transferred Under the Acid Rain Program
66.
67. Environmentally sound – Environmental quality is not sacrificed because the overall number of permits and allowances is lower than the total emissions level set by the regulatory agency.
68. SO2 Case Study Start-up costs expensive in order to set up a comprehensive permit trading system that is practicable and easy to operate. Obstacles and Implementation Issues (a) to develop own regional emissions trading scheme for SO2 or NOX following the USEPA approach (b) operate as a trading hub for emissions trading of air pollutants (SO2 and NOX) and/or GHG. - Even a combination of (a) and (b). Possible opportunities are Allowance Prices (1995-2004)