I. No class IV or V highway shall be discontinued or discontinued subject to gates and bars without the vote of the local legislative body as required by RSA 231:43 or RSA 231:45.
II. No vote or other action of the governing body shall be effective to reclassify a class IV or V highway as a class VI highway, except for the failure to maintain and repair that highway in suitable condition for travel thereon for 5 or more successive years as provided by RSA 229:5, VII.
III. Any municipality which neglects to maintain and repair a class IV or V highway, without the vote of the legislative body, shall be subject to proceedings under RSA 231:90 or RSA 231:82 at any time prior to the lapse of the 5-year period under RSA 229:5, VII.