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PC §30.05.
CRIMINAL TRESPASS.
(a) A person commits an offense if he enters or remains on or in property, including an aircraft or other
vehicle, of another without effective consent or he enters or remains in a building of another without effective consent and he:

(1) had notice that the entry was forbidden; or

(2) received notice to depart but failed to do so.

(b) For purposes of this section:

(1) "Entry" means the intrusion of the entire body.

(7) "Critical infrastructure facility" means one of the following, if completely enclosed by a fence or other physical barrier that is obviously designed to exclude intruders:

(A) a chemical manufacturing facility;

(B) a refinery;

(I) a gas processing plant, including a plant used in the processing, treatment, or fractionation of natural gas; or

(f) It is a defense to prosecution under this section that:

(1) the basis on which entry on the property or land or in the building was forbidden is that entry with a handgun was forbidden; and

(2) the person was carrying a concealed handgun and a license issued under Subchapter H, Chapter 411, Government Code, to carry a concealed handgun of the same category the person was carrying.