Take the following as truth: 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.
Then the following statement: "Automobile and light-duty truck manufacturers can volunteer to comply with tailpipe standards that are more strict than EPA can mandate at this time. " is true, false, or inconclusive?