Code of Iowa: No distance listed.
http://search.legis.state.ia.us/nxt/gateway.dll/ar/iac?f=templates&fn=default.htm
571 - 106.7(6)
Prohibited weapons and devices.
The use of dogs, domestic animals, bait, rifles other than muzzleloaded or as provided in
106.7(5), handguns except as provided in
106.7(3), crossbows except as provided in
106.7(1), automobiles, aircraft, or any mechanical conveyance or device, including electronic calls, is prohibited, except that paraplegics and single or double amputees of the legs may hunt from any stationary motor-driven land conveyance. “Bait” means grain, fruit, vegetables, nuts, hay, salt, mineral blocks, or any other natural food materials; commercial products containing natural food materials; or by-products of such materials transported to or placed in an area for the intent of attracting wildlife. Bait does not include food placed during normal agricultural activities. “Paraplegic” means an individual with paralysis of the lower half of the body with involvement of both legs, usually due to disease of or injury to the spinal cord. It shall be unlawful for a person, while hunting deer, to carry or have in possession a rifle except as provided in
106.7(3) and
106.7(5). It shall be unlawful for a person hunting with a bow license to carry a handgun unless that person also has a valid deer hunting license and an unfilled transportation tag that permits a handgun to be used to take deer.