SEC. 185B. NOx AND VOC STUDY.
  The Administrator, in conjunction  with the National Academy of
Sciences, shall conduct a  study on the role of  ozone precursors
in  tropospheric ozone  formation  and control.  The study  shall
examine  the roles of NOx and VOC emission reductions, the extent
to which NOx reductions  may contribute (or be counterproductive)
to  achievement of  attainment in different  nonattainment areas,
the sensitivity of ozone to the control of NOx , the availability
and  extent of  controls  for  NOx ,  the  role  of biogenic  VOC
emissions,  and the  basic information  required for  air quality
models. The study shall  be completed and a proposed  report made
public  for 30  days comment  within 1  year of  the date  of the
enactment of  the Clean Air Act  Amendments of 1990,  and a final
report shall be submitted to Congress within 15 months after such
date of enactment. The  Administrator shall utilize all available
information   and  studies,   as  well   as   develop  additional
information, in conducting the study required by this section.
[42 U.S.C. 7511f]