Under the Smoky Vehicle Program vehicles blowing smoke can be reported.
The Clean Air Act prohibits all vehicles blowing smoke for more than 10 seconds. If you see and vehicle exceed this 10 second smoke rule you can report them to the DEC's pollution line by phoning 131 555 or at www.environment.nsw.gov.au/esdsmoky/index.htm
The DEC can issue infringement and defect notices to owners of smoky vehicles.
Vehicles identified as being smoky are given 30 days by the DEC to have the vehicles repaired. If the vehicles are not repaired they are required to have an emission test at the RTA. If the vehicle fails this test it will be issued with an defect notice.