RSA 263:13 Restricted Licenses.

I. The department, upon issuing a driver's license, may for good cause impose restrictions suitable to the licensee's driving ability with respect to special mechanical control devices required on a motor vehicle which the licensee may drive or such other restrictions applicable to the licensee as the department may determine to be appropriate to assure the safe driving of a motor vehicle by the licensee.
II. The department may issue a restricted license to a person who can safely drive a motor vehicle during daylight hours, but who, for medical reasons, can not safely drive a motor vehicle during darkness.
III. The department may either issue a special restricted license or may set forth such restrictions upon the usual license form.
IV. The department may, upon r