Originally Posted by nuclearlemon
76 to 82. when federal emissions started. anything prior to that, you just walk in and get your plates.
Federal emission requirements started with the 1968 model year
Colorado obviously doesn't care about what the federal requirements were when the vehicles were designed, certified by EPA and sold. The original requirements were in ppm of CO and HC. Now they are in grams per mile. The Colorado legislature keeps moving the goalposts.
I assume the underlying motivation is that the auto industry gives campaign contributions to lawmakers who will pass legislation which gets cars off the road so the industry can sell more new cars. Nowhere was this more blatant than the so-called "cash for clunkers" boondoggle several years ago.