Annual allowance
CSAPR NOXAnnual allowance means a limited authorization issued and allocated or auctioned by the Administrator under this subpart, or by a State or permitting authority under a SIP revision approved by the Administrator under 52.38(a)(3), (4), or (5) of this chapter, to emit one ton of NOX during a control period of the specified calendar year for which the authorization is allocated or auctioned or of any calendar year thereafter under the CSAPR NOX Annual Trading Program.