(A) It is unlawful for a person to knowingly trespass upon the property of another. As used in this section, the term PROPERTY includes any land, dwelling, building, conveyance, vehicle or other temporary or permanent structure whether publicly or privately owned. The term TRESPASS means one or more of the following acts:
(1) Entering property without permission. Entering upon or in property without the express permission of the owner, lessee or person in lawful possession with the intent to commit a public offense or to use, remove therefrom, alter, damage, harass or place thereon or therein anything animate or inanimate;
(Iowa Code § 716.7(2)(a))
(2) Entering or remaining on property. Entering or remaining upon or in property without justification after being notified or requested to abstain from entering or to remove or vacate therefrom by the owner, lessee or person in lawful possession, or by any peace officer, magistrate or public employee whose duty it is to supervise the use or maintenance of the property;
(Iowa Code § 716.7(2)(b))
(3) Interfering with lawful use of property. Entering upon or in property for the purpose or with the effect of unduly interfering with the lawful use of the property by others; and/or
(Iowa Code § 716.7(2)(c))
(4) Using property without permission. Being upon or in property and wrongfully using, removing therefrom, altering, damaging, harassing or placing thereon or therein anything animate or inanimate, without the implied or actual permission of the owner, lessee or person in lawful possession.
(Iowa Code § 716.7(2)(d))
(B) None of the above shall be construed to prohibit entering upon the property of another for the sole purpose of retrieving personal property which has accidentally or inadvertently been thrown, fallen, strayed or blown onto the property of another, provided that the person retrieving the property takes the most direct and accessible route to and from the property to be retrieved, quits the property as quickly as is possible, and does not unduly interfere with the lawful use of the property.
(Iowa Code § 716.7(3))
(Iowa Code §§ 716.7, 716.8) (1999 Code, § 43.01) Penalty, see § 10.99