11 GCA § 3419: Same: To Minor.

(a) A licensee, his agent or employee shall not sell, give, nor permit to be sold, given or served any alcoholic beverages to any person under twenty-one (21) years of age. For the purpose of preventing any violation of this Section, any licensee, or his agent or employee, may refuse to sell or serve alcoholic beverages to any person who is unable to produce adequate written evidence that he or she has reached the age of twenty-one (21) years. In any criminal prosecution or proceeding for the suspension or revocation of any license and based upon a violation of this Section, proof that the defendant licensee, or his agent or employee, demanded and was shown, before furnishing any alcoholic beverage to a minor, an identification card or other bona fide documentary evidence of majority of such person shall be a defense to such prosecution or proceeding for the suspension or revocation of any license.

(b) Every person who violates this Section shall be guilty of a petty misdemeanor.