The definitions in Iowa Code section 328.1 and rule 761-700.1 (328) shall apply to this chapter. In addition:
"Obstruction " means any structure, object of natural growth, or use of land that impedes the airspace required for the takeoff or landing of aircraft at an airport.
"Private use " means available for use by the owner or by the owner and other persons authorized by the owner.
"Public use " means available for use by the general public without prior approval from the owner or operator.
Iowa Admin. Code r. 761-720.2