06- 096 C.M.R. ch. 146, § 4 - Prohibition
Diesel-powered motor vehicles shall not exceed the following:
A. For model years 1991 and
newer, a level of peak smoke opacity of forty (40) percent;
B. For model years 1974 to 1990, a level of
peak smoke opacity of fifty-five (55) percent; and
C. For model years 1973 and older, a level of
peak smoke opacity of seventy (70) percent. This standard shall remain in
effect until January 1, 2003. After January 1, 2003, model years 1973 and older
shall be subject to the standard set forth in Subsection 4(B) of this
Chapter.
Notes
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