(1) Reasonableness. All airport zoning regulations adopted under this act shall be reasonable and none shall impose any requirement or restriction which is not reasonably necessary to effectuate the purposes of this act. In determining what regulations it may adopt, each political subdivision shall consider, among other things, the character of the flying operations expected to be conducted at the airport, the nature of the terrain within the airport hazard area, the character of the neighborhood, and the uses to which the property to be zoned is put and adaptable.

(2) Nonconforming uses. No airport zoning regulations adopted under this act shall require the removal, lowering, or other change or alteration of any structure or tree not conforming to the regulations when adopted or amended, or otherwise interfere with the continuance of any nonconforming use, except as provided in subsection (3) of Kan. Stat. Ann. § 3-707, or any amendments thereto: Provided, however, That any political subdivision may require, upon thirty days notice in writing any person, firm, association, or corporation owning and maintaining any nonconforming pole or pole line upon the roads and highways immediately adjoining said airport to remove, lower, change, or alter said nonconforming pole or pole line, upon prior payment by the owner or owners of said airport, whether municipal or private, to said person, firm, association, or corporation of the reasonable and necessary expense of removing, lowering, changing, or altering said pole or pole lines; or in lieu thereof to execute good and sufficient bond with corporate surety thereon as security for the payment of the reasonable and necessary expense of removing, lowering, changing, or altering such pole or pole lines. Reasonable and necessary expense of removing, lowering, changing, or altering said pole or pole lines shall include, among other items of expense, the actual cost of: (1) Constructing underground conduits and the construction of such wires and equipment in such conduits; and (2) rerouting wires together with the poles, cross arms and other equipment connected thereto, together with the cost, if any, of new right of way made necessary by such rerouting.