Any permit or variance granted under section 57 or 58 of this title may, if such action is deemed advisable to effectuate the purposes of this chapter and reasonable in the circumstances, be so conditioned as to require the owner of the structure or tree in question to permit the Virgin Islands Port Authority of the United States Virgin Islands, at its own expense, to install, operate, and maintain thereon such markers and lights as may be necessary to indicate to flyers the presence of an airport hazard.