The Texas Alcoholic Beverage Code - Minors §106.07
Sec. 106.07. MISREPRESENTATION OF AGE BY A MINOR
(a) A minor commits an offense if he falsely states that he is 21
years of age or older or presents any document that indicates he is 21
years of age or older to a person engaged in selling or serving
alcoholic beverages.
(b) An offense under this section is punishable as provided by Section 106.071.