Texas Penal Code
§ 1.07. Definitions.
(19) "Effective consent" includes consent by a person legally authorized to act for the owner. Consent is not effective if:
(A) induced by force, threat, or fraud;
(B) given by a person the actor knows is not legally authorized to act for the owner;
(C) given by a person who by reason of youth, mental disease or defect, or intoxication is known by the actor to be unable to make reasonable decisions; or
(D) given solely to detect the commission of an offense.