In order to insure that any variance so granted by the Board of Adjustments is consistent with the spirit of the Ordinance and recognizing that there could be fact situations where the spirit of this Ordinance could be observed only if conditions were imposed upon the granting of the variance, the Board of Adjustments is specifically empowered to grant a variance upon conditions such as, but not limited to, landscaping, type of construction, hours of operation, traffic patterns, parking requirements, yard sizes, time periods, deed restrictions, bonds, etc. and further provide that in the absence of said conditions being met, said variance shall be null and void. [Code § 12.36-14.]