(a) The expiration date for each driver's license, other than under-21 licenses, is the birthday of the driver in the fourth year following the date of issuance of the license. The birthday of the driver shall be as indicated on the application for a driver's license. A license may be renewed on or before expiration or within one year after expiration upon application, payment of the required fee, and passing the examination required of all drivers for renewal. Driving privileges shall be extended or renewed on or preceding the expiration date of an existing driver's license unless the commissioner believes that the licensee is no longer qualified as a driver.
(b) The expiration date for each under-21 license shall be the 21st birthday of the licensee. Upon the licensee attaining the age of 21 and upon the application, payment of the required fee, and passing the examination required of all drivers for renewal, a driver's license shall be issued unless the commissioner determines that the licensee is no longer qualified as a driver.
(c) The expiration date for each provisional license is two years after the date of application for the provisional license.
(d) Any valid Minnesota driver's license issued to a person then or subsequently serving outside Minnesota in active military service, as defined in section 190.05, subdivision 5, in any branch or unit of the armed forces of the United States, or the person's spouse, shall continue in full force and effect without requirement for renewal until the date one year following the service member's separation or discharge from active military service, and until the license holder's birthday in the fourth full year following the person's most recent license renewal or, in the case of a provisional license, until the person's birthday in the third full year following the renewal.