The Board of Zoning Appeals and Adjustments shall have the following powers:
(A) To hear and decide appeals where it is alleged that there is an error in any order, requirement, decision, or determination made by the Administrator or Commission in the enforcement of the zoning ordinance.
(B) To hear requests for variances from the literal provisions of the ordinance in instances where their strict enforcement would cause undue hardship because of circumstances unique to the individual property under consideration, and to grant such variances only when it is demonstrated that such actions will be in keeping with the spirit and intent of the ordinance. The Board may not permit as a variance any use that is not permitted under the ordinance for property in the zone where the affected person's land is located. The Board may permit as a variance the temporary use of a one family dwelling as two family dwelling. The Board may impose conditions in the granting of variances to insure compliance and to protect adjacent properties.
('69 Code, § 7-28.02)