GBUAPCD RULE 1212 CRITERIA & PROCED.: LATEST EMISSIONS MODEL
LAST REVISED 11/11/11



§ 1212 Criteria and procedures: Latest emissions model.

(a) During all periods the conformity determination shall be based on the latest emission estimation model available. This criterion is satisfied if the most current version of the motor vehicle emissions model specified by EPA for use in the preparation or revision of implementation plans in the State or area is used for the conformity analysis. (Where EMFAC is the motor vehicle emissions model used in preparing or revising the applicable implementation plan, new versions must be approved by EPA before they are used in the conformity analysis.)

(b) Conformity analyses for which the emissions analysis was begun before the Federal Register notice of availability of the latest emission model, or during the grace period announced in such notice, may continue to use the previous version of the model for transportation plans and TIPs. The previous model may also be used for projects if the analysis was begun during the grace period or before the Federal Register notice of availability, provided no more than three years have passed since the draft environmental document was issued.