Where, by reason of exceptional narrowness, shallowness, or shape of a specific piece of property, or by reason of exceptional topographic conditions, or by reason of other extraordinary and exceptional situation or condition of such piece of property, the strict application of any regulation, pursuant to Article XIII 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 appeal relating to such property, a variance from such strict application of the regulation so as to relieve such difficulties or hardship; provided, however, that no variance shall be granted under this subsection, to allow a structure or use in a district restricted against such structure and use; 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 shall review a request for a variance.[2]