The municipality is hereby divided into zones or districts as shown on the Zoning Map, that together with explanatory materials thereon is hereby adopted by reference and declared to be part of this chapter, together with all future notations, references and amendments.
A. 
Identification of Zoning Map. The Zoning Map shall be identified by signature of the governing body and attested to by the Secretary of the Borough, together with the date of enactment of this chapter.
B. 
Changing the Zoning Map.
(1) 
If, in accordance with the provisions of this chapter and the Pennsylvania Municipalities Planning Code, as amended, changes are made in district boundaries or other matters portrayed on the Zoning Map, such changes shall be entered on the Zoning Map promptly after the amendment has been made by the governing body.
(2) 
No changes of any nature shall be made on the Zoning Map, or matter shown thereon, except in conformity with the procedures set forth in this chapter or any state law, if applicable. All changes shall be noted on the Zoning Map by date with a brief description of the nature of the change.
C. 
Location of Zoning Map. The Zoning Map shall be prominently displayed in the offices of the Borough and an official copy shall be prominently displayed in the offices of the Borough Zoning Officer. The Zoning Map shall be the final authority as to the current zoning status of land and water areas in the municipality, regardless of the unofficial copies that may have been made or published from time to time.
D. 
Replacement of Zoning Map. In the event that the Zoning Map becomes damaged, destroyed, lost or difficult to interpret because of the nature or number of changes and additions, the governing body may, by resolution, adopt a new Zoning Map that shall supersede the prior Zoning Map.
(1) 
The new Zoning Map may correct drafting or other errors or omissions in the prior Zoning Map, but no such correction shall have the effect of amending the original Zoning Map or any subsequent amendment thereof.
(2) 
The new Zoning Map shall be identified by the signatures of the governing body and attested to by the Secretary of the Borough, and shall bear the following words: "This is to certify that this Zoning Map supersedes and replaces the Zoning Map adopted December 19th, 2000, as part of Ordinance No. 928 of the Borough of Lewisburg, Union County, Pennsylvania."
(3) 
Unless the prior Zoning Map has been lost or totally destroyed, the prior map or any significant parts thereof remaining shall be preserved together with all available records pertaining to its adoption or amendment.
For the purpose of this chapter, the municipality is hereby divided into districts that shall be designated as follows:
A. 
Residential Suburban (RS): This district is intended to provide residential development on lots of 10,000 square feet or greater.
B. 
Residential Town One (RT1): This district is intended to be primarily a residential district of single-family detached and two-family dwellings.
C. 
Residential Town Two (RT2): This district is intended to provide higher density residential uses as well as certain light-density commercial uses and professional offices that retain the historic residential appearance of existing structures.
D. 
Residential Town Three (RT3): This district is intended to provide residential development on lots of 5,000 square feet or greater. This district also includes structures and lands owned by or operated by Bucknell University, not located within the Bucknell University District.
E. 
Highway Commercial (HC): This district is designed to allow for more intense commercial development, such as restaurants, large-scale retail and high-traffic generators, including office complexes, motels and convenience stores. This district is intended to include lots or parcels that contain frontage on Route 15.
F. 
Downtown Commercial (DC): This district is designed to accommodate traditional commercial uses such as retail, office, banks, restaurants and services.
G. 
Mixed-Use (MU): This district provides an area for a mixture of uses, including compatible light industrial uses, to exist within reasonable proximity to each other and to Routes 15 and the railroad.
H. 
Bucknell University (BU): This district is designed specifically for structures and lands owned, operated by or associated with Bucknell University that form the contiguous campus area.
I. 
Open Space (OS): This district provides designated areas for active and passive recreation, wildlife habitat and flood protection. This district shall include lands within the floodways and sections of the floodplain as identified in the most recent Floodplain Mapping produced by the U.S. Department of Housing and Urban Development as part of the Borough Flood Insurance Study, as well as lands that are primarily open space or recreation areas in the Borough.
J. 
Historic District (HD): This district is composed of land located within the mapped historic district of the Borough and is listed in the National Register of Historic Places. This district shall be an overlay district to the Zoning Map, and regulations applying to the underlying district shall be applicable to all lands situated in the district.
K. 
Floodplain District: See Article VI and refer to the applicable Flood Insurance Study prepared by the Federal Insurance Administration dated October 16, 2009, or the most recent revision thereof. This district shall be an overlay district to the Zoning Map, and regulations applying to the underlying district shall be applicable to all lands situated in the district.
Where uncertainty exists as to the boundaries of districts as shown on the Zoning Map, the following rules shall apply:
A. 
Designation of district boundaries: Boundaries indicated as approximately following the center line of streets, highways, alleys, railroad rights-of-way, streams, watercourses, existing lot lines or municipal boundary lines shall be construed as to follow such features indicated. Where a district boundary line does not follow such a feature, its position is indicated on said Zoning Map by a specific dimension expressing its distance, in feet, from a street right-of-way line or other boundary line as indicated and running parallel thereto.
B. 
Determination of the location of boundaries: Where physical or cultural features existing on the ground differ with those shown on the Zoning Map, or if uncertainty exists as to the true location of a distance boundary line in a particular instance, the Zoning Officer shall request the Zoning Hearing Board to render its determination with respect thereto, in accordance with the procedures established in this chapter.