Counties with airport zoning must have a board of airport zoning appeals, or the county legislative body must designate the board of zoning appeals created under Title 13, Chapter 7, of the Tennessee Code or by private or other local act to hear appeals from airport zoning resolutions or ordinances. If an airport zoning board of appeals is created by resolution of the county legislative body, then the county legislative body specifies whether the board will have three or five members and the mode of appointment of members and their terms, but the terms must be arranged so that the term of one member expires each year. The county legislative body also determines the compensation, procedure and extent of jurisdiction consistent with state law. Appeals to this board may be made by any person aggrieved under airport zoning resolutions or ordinances, such as by alleged errors made by the building commissioner in denying a building permit. Also, the board may authorize a variance in an airport zoning resolution or ordinance in cases of exceptional hardship when this can be done without substantially impairing the intent and purpose of the zoning plan and may condition the a permit for a variance. T.C.A. § 42-6-108 et seq.