No premises shall hereafter be used or occupied, and no principal building or accessory structure shall be hereafter erected, constructed, moved, or altered except in conformity with this article.

A requested use or structure that is not expressly permitted in a classification shall be prohibited in that classification.

Every principal or accessory structure to be erected upon a lot shall meet all yard, lot coverage, floor area and building height requirements of its classification unless otherwise expressly permitted by these Regulations.

No part of a yard, or other required open space, or of the off-street parking or loading spaces for one (1) structure, shall be included as part of a yard, open space, or off-street parking or loading space requirements for any other structure.

No lot existing on the effective date of this Ordinance shall be reduced in area and width below the minimum requirements of its classification, except lots made up of combinations of non-conforming lots (refer to Section 5.4.1, A.) or Cluster Subdivision lots (refer to the definition of "Subdivision, Cluster").