Section 9
SEC. 9. The National Pollution Control Commission, in consultation with the Land Transportation Commission, Board of Transportation, Philippine Constabulary, I ntegrated National Police, Department of Local Government and Community Development, and in coordination and cooperation with the traffic enforcement agencies, may, under certain circumstances, prohibit or enjoin in writing, the use of motor vehicles or any specified class of motor vehicles in any area or street at all times, or during particular times, as may be/so specified in order to protect human health and public welfare and to ensure compliance with the established national ambient air quality standards.