Airport zoning regulations adopted under this chapter may require that a permit be obtained before any new structure or use may be constructed or established and before any existing use or structure may be substantially changed, altered, or repaired. The permit shall be issued if the structure, as erected or altered, conforms with the regulations, or will not constitute a greater hazard than the structure which is replaced or altered. In any event, however, all regulations shall provide that before any nonconforming airport hazard may be replaced, substantially altered, repaired, rebuilt, allowed to grow higher, or replanted, a permit must be secured from the administrative agency authorized to administer and enforce the regulations, authorizing the replacement, change, or repair. A permit shall not be granted that would allow the establishment or creation of an airport hazard or permit a nonconforming airport hazard or use to be made or become higher or become a greater hazard to air navigation than it was when the applicable regulation was adopted or than it is when the application for a permit is made. Except as provided in this chapter, all applications for permits shall be granted. (Added 1985, No. 222 (Adj. Sess.), § 2.)