Except as hereinafter provided, no building or structure or part thereof and no lot or land or part therof shall hereafter be used except for a purpose specifically permitted by the provisions of the Table of Use Regulations for the district in which such building or structure, lot or land is located on the Zoning Map.

Any lawful use that does not conform to the use regulations of this chapter shall be deemed a nonconforming use. (See Article XII.)

A special exception use authorized by the Planning Board shall be deemed a conforming use.

A use authorized by a variance from the use regulations of this chapter, granted by the Board of Appeals, shall be deemed a nonconforming use.

Except as herinafter provided, no building or structure or part thereof shall hereafter be erected, structurally altered, enlarged, rebuilt, or moved except in conformity with the provsions of the Table of Dimensional Regualtions for the district in which such building or structure is located on the Zoning Map.

Any lawfully existing building or structure that does not conform to such dimensional regulations of this chapter shall be deemed a nonconforming building or structure, irrespective of the use to which it is put. (See Article XII.)

A building or structure or part thereof authorized as a variance from the dimensional regulations of this chapter, granted by the Board of Appeals, shall be deemed a nonconforming building or structure or part thereof.