Where by reason of exceptional narrowness, shallowness or shape of a specific piece of property, or by reason of exceptional topographic conditions, or physical features uniquely affecting a specific piece of property or by reason of an extraordinary and exceptional situation uniquely affecting a specific piece of property or the structures lawfully existing thereon, the strict application of any regulation area or dimension of this Ordinance would result in peculiar and exceptional practical difficulties to, or exceptional and undue hardship upon the developer of such property, grant, upon an application or an appeal relating to such property, a variance from such strict application of such regulation so as to relieve such difficulties or hardship where in an application or appeal relating to a specific piece of property the purposes of this act[1] would be advanced by a deviation from the Zoning Ordinance requirements and the benefits of the deviation would substantially outweigh any detriment, grant a variance to allow departure from regulations pursuant to Article 8 of this act; provided, however, that no variance from those departures enumerated in Subsection a,4 of this section shall be granted under this paragraph; and provided further that the proposed development does not require approval by the Planning Board of a subdivision, site plan or conditional use in conjunction with which the Planning Board has power to review a request for a variance.