Except as hereinafter provided, no building or structure or part thereof and no lot or land or part thereof shall hereafter be used except in conformity with the use regulations herein prescribed. Any lawful use existing at the date of passage of this chapter shall be deemed a nonconforming use, except that uses granted as special exception uses by the Zoning Hearing Board pursuant to § 108-36 shall be deemed conforming uses. Variances granted by the Zoning Hearing Board pursuant to § 108-37 shall also be deemed nonconforming.

Except as hereinafter provided, no building or structure or part thereof shall hereafter be erected, structurally altered, enlarged or rebuilt except in conformity with the lot dimension, yard, court, coverage, height and density regulations herein prescribed. Any building or structure existing at the date of passage of this chapter that does not conform to such regulations, hereinafter referred to as the "building regulations" of this chapter, shall be deemed a nonconforming structure, irrespective of the use to which it is put. Building variances granted by the Zoning Hearing Board pursuant to § 108-37 on grounds of unnecessary hardship, not self-imposed, shall also be deemed nonconforming structures.

Any legally established existing use of a building or structure, lot or land, or part thereof, which use constitutes a conforming use under the provisions of this chapter, may be continued.