Is an employer required to reimburse for mileage when they require an employee to use their personal car and gas for travel between locations?

Question Details:

My husband was hired at a shop close to home. Since being hired, they have shut down most of that shop and are now requiring him to travel to 2 different shops anywhere between 50 and 100 miles per day. They are making him use his own car and are not reimbursing for mileage. Is there a law that says they have to? Important Notice