Originally Posted by 1FastS2k,Aug 21 2010, 03:53 AM

So the question is, can a police officer be it AZ, CA or any other state, enforce a federal law?

Taken from the EPA.gov site:

(11) What may happen if I don't use the correct converter?
First, it is a violation of Federal law because it is likely to increase the amount of pollution
coming out of the vehicle. Penalties for violations by individuals, service or repair shops or fleet
operators are up to $2,500 per violation. (Each improper installation is considered a violation.) New
car dealers can be penalized up to $25,000 per violation. Any person who causes a violation could
be subject to the same penalty as the installer.