In particular cases and for special reasons, grant a variance to allow departure from the regulations of this Ordinance to permit: (1) a use or principal structure in a district restricted against such use or principal structure, (2) an expansion of a nonconforming use, (3) deviation from a specification or standard pursuant to N.J.S.A. 40:55D-67 pertaining solely to a conditional use, (4) an increase in the permitted floor area ratio as defined in N.J.S.A. 40:55D-4, (5) an increase in the permitted density as defined in N.J.S.A. 40:55D-4, except as applied to the required lot area for a lot or lots for detached one or two dwelling unit buildings, which lot or lots are either an isolated undersized lot or lots resulting from a minor subdivision, or six a height of a principal structure which exceeds by 10 feet or 10% the maximum height permitted in the zone district for a principal structure. A variance under this subsection shall be granted only by affirmative vote of at least five members of the Board of Adjustment.