No test required on AZ on vehicles older than 1967. Nothing to do with antique status; just an arbitrary date. 

Karl Wolz
Sent from my electronic umbilicus

> On Apr 3, 2015, at 9:33 AM, Jon VO <jondvo@GMAIL.COM> wrote:
> 
> Colorado (front range) & California are 1975 & older. '76 & newer must
> pass yearly emissions with the original emissions equipment intact - can
> be a major headache. Seems like 1980 would be a better cutoff year, as
> by then most cars had 3 way cats & some form of engine management that
> worked.
> Jon