Detroit Diesel Corp. v. Attorney General

OPINION OF THE COURT

Nardelli, J. P.

In this appeal, we are called upon to determine whether the *3express preemption provision of the Clean Air Act precludes the Attorney General of the State of New York from pursuing claims arising out of the respondents’ manufacture of heavy-duty diesel engines which, purportedly, were equipped with electronic devices specifically designed to circumvent Federal emissions controls and, concomitantly, whether certain subpoenas duces tecum issued by the Attorney General in furtherance of those claims should be quashed.

The Federal Investigation

In the fall of 1997,…