The Environmental Protection Agency (EPA) is approving a state implementation plan revision submitted by New Jersey to revise its rules regarding the idling of diesel-powered vehicles. Specifically, the State's implementation plan revision revises the exceptions to and exemptions from the State's existing three-minute idling rule. The intended effect of this action is to approve, as consistent with section 110(a)(2) of the Clean Air Act, a control strategy that will help New Jersey achieve attainment of the National Ambient Air Quality Standards for ozone and fine particulate matter.