A bill to amend the Clean Air Act to provide for further assessment of the validity of the theory concerning depletion of ozone in the stratosphere by halocarbon compounds before proceeding with any further regulation of such compounds, to provide for needed further research and study, and for other purposes.

[AI summary unavailable — showing source text] Amends the Clean Air Act to revise provisions for ozone protection. Directs the Administrator of the Environmental Protection Agency to give priority in ozone protection studies and research to increasing actual measurements of stratospheric ozone and improving methods of identifying potential trends in such measurements. Directs the Administrator to contract annually with the National Academy of Sciences to: (1) continue review and research; (2) determine the extent, nature, and causes of changes in stratospheric ozone concentration; (3) investigate probable or possible effects on health and the environment; and (4) report all findings and associated uncertainties. Directs the National Academy of Sciences, in consultation with the National Aeronautics and Space Administration and the Administrator of the National Oceanic and Atmospheric Administration, to report, within two years after enactment of this Act and annually thereafter, all findings concerning actual or potential alteration of the concentration of ozone in the stratosphere, its causes, and associated implications and uncertainties. Requires that such report be made to the Administrator and to the Congress, with copies …