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WAC 173-422A-200
Exhaust emission test standards for diesel vehicles.
Model Year
Opacity (%)
1991 and older
50
1992-1996
40
1997-2008
30
[Statutory Authority: RCW
70.120.120
. WSR 11-17-041 (Order 08-01), § 173-422A-200, filed 8/10/11, effective 7/1/12.]