Any use not specifically set forth as a permitted use (as of right, accessory, or upon special use permit or conditional use permit, as the context may admit) in any zoning district shall be expressly prohibited in that district. A use specifically set forth as a permitted use in one district shall not be permitted in another district unless it is specifically set forth as a permitted use in said other district. No structure shall hereafter be erected or altered to exceed the height, to accommodate or house a greater number of families, to occupy a greater percentage of lot area or to have narrower or smaller rear yards, front yards, or side yards than are specified within this chapter for the district in which such building is located; and what is specified within this chapter as to dimensional and similar area requirements is further limited and qualified by any restrictions imposed by any applicable additional requirements, standards, and/or regulations contained in amendments to this chapter.

The districts established by this chapter shall be as follows:

The boundaries for each district listed as part of this chapter are indicated on the map entitled "The Official Zoning Map of the Town of Penfield," dated with the effective date of this chapter, which is hereby adopted by reference and declared to be part of this chapter, and hereinafter known as the "Official Zoning Map."

There shall exist only one Official Zoning Map, which shall be kept in the office of the Town Clerk and it shall bear the Seal of the Town of Penfield, a certification that it is "The Official Zoning Map of the Town of Penfield" and its date of adoption by the Town Board. Said Zoning Map shall be on material suitable for reproduction. Copies of this map, which may from time to time be published and distributed, would be accurate only as of the date of their printing and shall bear words to that effect. Changes made in district boundaries or other matters portrayed on the Zoning Map under the provisions of this chapter shall be permanently affixed to the Zoning Map promptly after the amendment has been approved by the Town Board and shall convey information as to the date and nature of the change. No amendment to this chapter which involves changes to the Zoning Map shall become effective until such change and entry have been made on said map and have been certified by the Town Clerk. The Town Board may, by resolution, adopt a new Zoning Map to supersede any former map. The new Zoning Map shall bear a statement which explains that it supersedes the prior map and gives the dates of adoption of both the prior map and the new Zoning Map.

In making a determination where uncertainty exists as to boundaries of any of the aforesaid districts as shown on said zoning map, the location of such boundary, unless the same is indicated by dimension on the map, shall be determined by the Town Board.