Idaho Code § 23-612
Every person who possesses or consumes any beer, wine or other alcoholic beverage while present at any public school function on the property of a school district is guilty of a misdemeanor. Persons under twenty-one (21) years of age who are found to be in violation of the provisions of this section because of their age shall be punished according to section 18-1502 , Idaho Code.
[23-612, added 1980, ch. 389, sec. 1, p. 989; am. 1981, ch. 222, sec. 5, p. 413; am. 1982, ch. 110, sec. 4, p. 313; am. 1987, ch. 212, sec. 4, p. 450; am. 1990, ch. 344, sec. 1, p. 929.]