The Board of Zoning Appeals shall have the following powers:

Errors to hear and decide appeals where it is alleged there is error in any order, requirement, decision, or determination made by an administrative official or body in the course of enforcing this ordinance.

Variances to hear and grant appeals for variances as will not be contrary to the public interest where, owing to special conditions, a literal enforcement will result in practical difficulty or unnecessary hardship, so that the spirit and purposes of this ordinance shall be observed and the public safety, welfare, and justice secured. Use variances shall not be granted.

Substitutions to hear and grant applications for substitution of more restrictive nonconforming uses for existing nonconforming uses provided no structural alterations are to be made and the Village Plan Commission has made a review and recommendation. Whenever the Board permits such a substitution, the use may not thereafter be changed without application.