I don't know about Michigan BUT:
in California, your employer cannot DEMAND that you submit to a drug test or search. however, they may fire you if you refuse.
They can't forcibly break into your car to search it, but they can refuse to allow it on the property should you refuse the search.
in California, your employer cannot DEMAND that you submit to a drug test or search. however, they may fire you if you refuse.
They can't forcibly break into your car to search it, but they can refuse to allow it on the property should you refuse the search.