would limit the applicability of the final rule entitled "Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles-Phase 2" to the extent such final rule relates to trailers that do not themselves emit greenhouse gases in connection with a propulsion system. 

would require the EPA Administrator to establish a program under which the Agency shall defer the designation of an area as a nonattainment area for purposes of the 8-hour ozone NAAQS if the area achieves and maintains certain standards under a voluntary early action compact plan. 

would amend the CAA to eliminate the exemption for aggregation of emissions from oil and gas sources.

would disapprove the EPA rule relating to "Approval, Disapproval and Promulgation of Air Quality Implementation Plans; Partial Approval and Partial Disapproval of Air Quality Implementation Plans and Federal Implementation Plan; Utah; Revisions to Regional Haze State Implementation Plan; Federal Implementation Plan for Regional Haze." 

would disapprove the EPA rule relating to "Approval, Disapproval and Promulgation of Air Quality Implementation Plans; Partial Approval and Partial Disapproval of Air Quality Implementation Plans and Federal Implementation Plan; Utah; Revisions to Regional Haze State Implementation Plan; Federal Implementation Plan for Regional Haze."