In the construction of this Code, the rules contained in this Section shall be observed and applied, except when the context clearly indicates otherwise:

4.1

Rules.

4.1-1

Words used in the present tense shall include the future; and words used in the singular number shall include the plural number, and the plural, the singular.

4.1-2

The word "shall" is mandatory and not discretionary.

4.1-3

The word "may" is permissive.

4.1-4

The word "lot" shall include the words "plot," "piece," and "parcel"; the word "building" includes all other structures of every kind regardless of similarity to buildings; and the phrase "used for" shall include the phrases "arranged for," "designed for," "intended for," "maintained for," and "occupied for."

4.1-5

Whenever a word or term defined hereinafter appears in the text of this Code, its meaning shall be construed as set forth in the definition thereof.

4.2

Zoning Maps. The boundaries of the Districts are shown upon the map, which is hereto attached and made a part of this Chapter, which map is designated as "Zoning Map." The Zoning Map and all the notations, references and other information shown thereon are a part of this Chapter and have the same force and effect as if the Zoning Map and all the notations, references and other information shown thereon are a part of this Chapter and have the same force and effect as if the Zoning Map and all the notations, references, and other information shown thereon were all fully set forth or described herein, the original of which Zoning Map is proposed, attested and is on file in the office of the Village Clerk of the Village of Arlington Heights, Illinois.

4.3

New or Annexed Land. All territory which may hereafter be annexed to the Village of Arlington Heights shall be classified in the R-1 one family dwelling district except if said land has previously been subdivided in lots of area or dimension less than that required in the R-1 district, in which event said land shall be classified in the R-3 one family dwelling district. Said zoning classification or annexation may be changed by ordinance after public hearing as set forth in Section 4.3-1.

4.3-1

In the event owners of property sought to be annexed desire a zoning classification other than "R-1" a petition shall be submitted for the zoning classification desired simultaneously with petition for the annexation. The Board of Trustees shall refer said petition for zoning classification to the Plan Commission for proceedings to be held by the same in the manner and form as provided in Section 12 of this Chapter. Action on the petition for annexation shall be deferred until action is taken by the Board of Trustees on the recommendation of the Plan Commission.

4.3-2

Any area proposed for annexation to the present corporate limits of the Village shall be accompanied by a petition for the annexation of the same territory to the Arlington Heights Park District, unless the territory is already entirely within said Park District.

4.4

Zoning of Streets, Alleys, Public Ways, and Railroad Rights-of-Way. All streets, alleys, public-ways, and railroad rights-of-way; if not otherwise specifically designated, shall be deemed to be in the same zone as the property immediately abutting upon such alleys, streets, public-ways and railroad rights-of-way. Where the centerline of a street, alley, public-way or railroad right-of-way serves as a district boundary, the zoning of such areas, unless otherwise specifically designated, shall be deemed to be the same as that of the abutting property up to such center line.

4.5

Boundary Lines. Wherever any uncertainty exists as to the boundary line of any use district as shown on the zoning maps incorporated herein, the following rules shall apply:

4.5-1

Where district boundary lines are indicated as following streets, alleys, or similar rights-of-way, they shall be construed as following the centerlines thereof. In the case of two parallel and abutting streets, alleys, public-ways, or similar rights-of-way, the center of the same, as combined, shall constitute the district boundary lines, except in the case of the center line of the right-of-way of the Chicago and North Western Railroad, which such center line shall divide the use classification districts just immediately to the north and south of the center line of the railroad right-of-way, irrespective of intervening parallel and abutting public-ways as Northwest Highway.

4.5-2

Where district boundary lines are indicated as approximately following lot lines, such lot lines shall be construed to be such boundaries.

4.5-3

Where a lot held in one ownership and of record at the effective date of this Chapter is divided by a district boundary line, the entire lot shall be construed to be within the less restricted district; provided that this construction shall not apply if it increases the area of the less restricted portion of the lot by more than 20 percent.