Premise: The rule provides the main regulatory framework for the National Low Emission Vehicle program and creates the means whereby automobile and light-duty truck manufacturers can volunteer to comply with tailpipe standards that are more strict than EPA can mandate at this time.
Hypothesis: The rule does more than provide the main regulatory framework for the National Low Emission Vehicle program and create the means whereby automobile and light-duty truck manufacturers can volunteer to comply with tailpipe standards. 
Label: neutral