Yes, if the owner of the property or someone with apparent authority to act for the owner provides notice to the person by oral communication, or by written communication that meets certain requirements, before the person enters the property.G26ster wrote:You seem to be changing the "or" in § 30.06(a)(2)(A) to an "and". You can be prosecuted whether or not you refuse to leave. Simply receiving notice that the handgun was forbidden is enough according to the statute.
If the person receives "notice" after entry, and they depart after receiving notice, I don't think they commit an offense.
In practice, if they're gone before the police arrive, successful prosecution seems unlikely. Of course, in practice, concealed means concealed.