ok, here's a strange situation: my 79 300 t-top was made in Windsor for Canadian market, had to be shipped to the US to do the roof option, then sent back to Canada. As such it had a few options not available in US, and did not have catalytics. Fast forward about 20 years, the car is sold to US citizen. Now normally it would have to be retro fitted with catalytics to allow entry, but because it was already in the US once, for the roof alteration, it can come in as is. Weird, huh?