Where: 1. By reason of exceptional narrowness, shallowness or shape of a specific piece of property; or 2. By reason of exceptional topographic conditions or physical features uniquely affecting a specific piece of property; or 3. 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 zoning regulation of this chapter 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 would be advanced by a deviation from the zoning regulations requirements, and the benefits of the deviation would substantially outweigh any detriment, grant a variance to allow departure from regulations pursuant to those departures under this subsection, 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 pursuant to this section.