Any property owner desiring to erect any structure, or increase the height of any structure, or permit the growth of any tree under these regulations may apply to the Board of Appeals, as provided herein, for a variance from the regulations in question. A variance shall be granted where a literal application or enforcement of the regulations would result in practical difficulty or unnecessary hardship and the relief granted would not be contrary to the public interest but would result in substantial justice and be in accordance with the spirit of the regulations. [C.G.S. § 15-93(b)]

In granting any variance, the Board of Appeals may, if reasonably necessary to carry out the purpose of these regulations, condition the variance upon the owner of the structure or tree allowing the owner of the Airport, at its own expense, to install, operate and maintain suitable obstruction markers and obstruction lights on such structure or tree. [C.G.S. § 15-93(c)]

The authority to grant variances shall not extend to approvals reserved to and required by the Town Council, or to extend the runways or allow uses not permitted in the zones provided for in these regulations.