The Environmental Protection Agency (EPA) is taking final action on a State Implementation Plan (SIP) revision submitted by New Jersey which is intended to meet several Clean Air Act requirements. EPA is approving revisions to the 1990 base year ozone emission inventory; the 1996 and 1999 ozone projection emission inventories; photochemical assessment monitoring stations network; demonstration that emissions from growth in vehicle miles traveled will not increase motor vehicle emissions and, therefore, offsetting measures are not necessary; modeling efforts completed to date; transportation conformity budgets; and enforceable commitments. EPA is also giving conditional interim approval to New Jersey's 15 Percent Rate of Progress Plan and the 9 Percent Reasonable Further Progress Plan. The intended effect of this action is to approve programs required by the Clean Air Act which will result in emission reductions that will help achieve attainment of the national ambient air quality standard (NAAQS) for ozone.