Minn. Stat. § 65B.16

No notice of cancellation or reduction in the limits of liability of coverage of an automobile insurance policy under section 65B.15 shall be effective unless the specific underwriting or other reason or reasons for such cancellation or reduction in the limits of liability of coverage are stated in such notice and the notice is mailed or delivered by the insurer so as to provide the named insured with at least 30 days' notice prior to the effective date of cancellation; provided, however, that when nonpayment of premium is the reason for cancellation or when the company is exercising its right to cancel insurance which has been in effect for less than 60 days at least ten days' notice of cancellation, and the reasons for the cancellation, shall be given. Information regarding moving traffic violations or motor vehicle accidents must be specifically requested on the application in order for a company to use those incidents to exercise its right to cancel within the first 59 days of coverage. When nonpayment of premiums is the reason for cancellation, the reason must be given to the insured with the notice of cancellation; and if the company is exercising its right to cancel within the first 59 days of coverage and notice is given with less than ten days remaining in the 59-day period, the coverage must be extended, to expire ten days after notice was mailed.