Michiganders I need your exhaust/noise code law help...

Not to split hair but...
The section you're referring to states:

(2) A dealer shall not sell or offer for sale for use upon a street or highway in this state a new motor vehicle manufactured after April 1, 1978, which produces a maximum noise exceeding the following limits:

I think that means that the dealers can only sell new vehicles that meet the noise requirements after April 1st, 1978.
It doesn't mention anything about them selling used vehicles. In fact it appears as though the used vehicles don't comply, no biggie.




However my thought was that this covered all motor vehicles:

(1) After April 1, 1978, a motor vehicle shall not be operated or driven on a highway or street if the motor vehicle produces total noise exceeding 1 of the following limits at a distance of 50 feet except as provided in subdivisions (b)(iii) and (c)(iii):




The GM guy says because the dealers were allowed to sell used vehicles without having to conform to the new standards that they are still exempt from the noise code.