(a) A person commits the crime of trespass in the first degree if he knowingly enters unlawfully or knowingly remains unlawfully in a building or inhabitable structure or upon real property.

    (b) A person does not commit the crime of trespass in the first degree by entering or remaining upon real property unless the real property is fenced or otherwise enclosed in a manner designed to exclude intruders or as to which notice against trespass is given by:

    (1)    Actual communication to the actor; or

    (2)    Posting in a manner reasonably likely to come to the attention of intruders.

    (c) Trespass in the first degree is a class B misdemeanor.

(Code 1964, § 7.795)

     State law reference(s)--Similar provisions, RSMo. § 569.130.