Initiation. The Town Board, from time to time, upon its own motion or upon application by one or more property owners, or resolution of the Planning Board or Zoning Board of Appeals, may amend this chapter as provided herein. A property owner or authorized agent may apply for amendment to this chapter by filing three complete sets of an application with the Town Board and two complete sets with the Planning Board. The application shall include a description of the property or properties affected, a map showing the property or properties affected and all properties within a radius of 500 feet of the exterior boundaries thereof and the applicable filing fee. In the case of a proposed amendment which would apply only to properties which are not immediately identifiable or to a class of properties including six or more identifiable properties, no properties need be identified as affected.