EPA is granting final approval to Ohio's request for the retirement and withdrawal of 240 oxides of nitrogen (NO<INF>X</INF>) allowances from the State's 2005 new source set aside. Retiring 240 new source set aside allowances will provide surplus emission reductions to help compensate for the discontinuation of Ohio's motor vehicle inspection and maintenance program (known as "E-Check") in the Cincinnati and Dayton areas for the year 2006. (Ohio is in the process of seeking approval of the removal of E-Check as an active program from the State Implementation Plan (SIP), which will be addressed in a separate action.) EPA received adverse comments and one positive comment on our proposed rulemaking on the allowance retirement. These comments are addressed in this notice. As a result of this action, 240 NO<INF>X</INF> allowances from the State's 2005 new source set aside will be withheld and permanently retired.