AS 29.40.120

A recorded plat may not be altered or replatted except by the platting authority on petition of the state, the borough, a public utility, or the owners of a majority of the land affected by the alteration or replat. A platted street may not be vacated, except on petition of the state, the borough, a public utility, or owners of a majority of the land fronting the part of the street sought to be vacated. The petition shall be filed with the platting authority and shall be accompanied by a copy of the existing plat showing the proposed alteration or replat.