Conformance and permits required. No structure shall be erected, reconstructed, structurally altered, enlarged, or moved; nor shall any structure or land be used or designed to be used, for any use other than is permitted in the district in which such structure or land is located, and then only after applying for and securing all permits and licenses required by all laws and ordinances.

Substandard dwelling. No structure shall be used or occupied as a dwelling or as a boarding or rooming house, if such structure is in need of major structural repairs or is unsafe or unsanitary, or if the premises do not have connection with the Borough sewer system or alternative sanitary sewage facilities approved by the Department of Environmental Protection and/or Allegheny County Health Department. All dwellings shall comply with the rules and regulations of the Allegheny County Health Department and the Allegheny County Fire Marshal in effect and as presently promulgated, including any amendments that may be made from time to time thereto.

Notification of property owners. Wherever in this chapter there is a requirement for the notification of property owners, or wherever it is specified that a use may be permitted, provided consents of certain property owners are obtained, the provisions shall apply irrespective of municipal boundary lines.

Location of vehicular entrances or exits of certain uses. Any use or structure involving as a principal part of the conduct of a business the use or servicing of motor vehicles, such as an automobile and gasoline service station, automobile sales area, community garage, community parking area, major garage, major parking area, drive-in business, distribution plant, or a freighting or trucking terminal, shall be so located that no vehicular entrance or exit shall be closer than 200 feet to a principal entrance or exit to any elementary or secondary or vocational school, playground, hospital, church, or public library that is located on the same street or way (except when the latter are nonconforming uses or structures). Similarly, no principal entrance or exit to any elementary or secondary, or vocational school, playground, hospital, church, or public library, shall be located closer than 200 feet to a vehicular entrance or exit such as first noted above (except when the first-mentioned uses or structures are nonconforming).

Zoning districts dividing property. Where one parcel of property is divided into two or more portions by reason of different zoning district classifications, each of these portions shall be used independently of the others in its respective zoning classifications and, for the purpose of applying the regulations of this chapter, each portion shall be considered as if in separate and different ownership.

Area requirements. Except as herein provided, no structure hereafter shall be erected, or reconstructed, or enlarged, or moved on a lot, or moved to another lot, unless such structure or enlargement conforms with the area regulations of the district in which such structure is located or is to be located.

No reduction of open spaces on zoning lot. No yards or other open spaces shall be diminished below that prescribed by this chapter.

Open space on a zoning lot appurtenant to another zoning lot. No required yard or other open space around an existing structure or which hereafter is provided around any structure, for the purpose of complying with the provisions of this chapter, shall be considered as providing a yard or open space for any other structure; nor shall any yard or other required open space on an adjoining lot be considered as providing a yard or open space on a lot whereon a structure is to be erected.

No future street space to be included as yard space. No occupancy permit shall be issued for a structure on a lot over which there extends a street located by Borough ordinance unless there is provided between the structure and the line of the located street, a yard or yards, as prescribed herein for the lot as it will be after the located street is opened.

Yard screening and maintenance. In Commercial or Industrial Districts, when a side or rear yard abuts property in an "A" or "B" Residence District, or when a zoning lot abuts an "A" or "B" Residence District:

Vision clearance on a corner lot.