Examination of licensee - Grounds - Revocation, suspension, or restriction of

driving privileges. If the director has good cause to believe that a licensee is physically or mentally incompetent to safely operate a motor vehicle, or otherwise not qualified to be licensed, the director may upon written notice of at least five days require such licensee to submit to such physical, mental, or driver's examination which the director may deem necessary to determine such licensee's fitness to safely operate a motor vehicle upon the highways of this state. The director may require physical or mental examinations by licensed medical doctors or psychiatrists and a report thereof to be submitted to the director. Expenses of such examinations shall be borne by the licensee whose fitness to safely operate a motor vehicle is in question. If the director determines from the results of such examinations that such licensee is unfit to safely operate a motor vehicle, the director may suspend or revoke a licensee's privileges to operate a motor vehicle in this state, or may issue a license subject to such restrictions as are authorized to be imposed by North Dakota Century Code section 39-06-17. Refusal or neglect of the licensee to submit to such examination shall be grounds for license suspension or revocation.