I read it different.
http://www.michigan.gov/sos/0,4670,7-127-1627_8665_9070-24738--,00.html
You will be immediately placed out-of-service for 24 hours if you:
Refuse to take a preliminary breath test (PBT)
Consume alcohol within four hours prior to operating a CMV
Consume alcohol while operating a CMV
Have a bodily alcohol content (BAC) of .015 grams or more per 100 milliliters of blood, per 210 liters of breath, or per 67 milliliters of urine
Just can't drive within 24 hours.
Other Alcohol Violations
If you have consume too much alcohol and operate a commercial motor vehicle, you can be charged with:
Operating with an unlawful bodily alcohol level (UBAL) of .10 grams or more per 100 milliliters of blood, per 210 liters of breath, or per 67 milliliters of urine
Operating under the influence of liquor (OUIL)
Operating while impaired (OWI) when your BAC is more than .07 but less than .10 grams per 100
milliliters of blood, per 210 liters of breath, or per 67 milliliters of urine
Operating with a BAC of .04 - .07 grams per 100 milliliters of blood, per 210 liters of breath, or per 67 milliliters of urine
OUIL, OWI or UBAL causing death or serious injury
It says directly that if you consume and operate a commercial motor vehicle, not if you're operating your personal vehicle.