Idaho Code § 23-1024: False representation as being twenty-one or more years of age a misdemeanor.

Any person under the age of twenty-one (21) years who shall by any means represent to any person licensed to sell beer at retail or wholesale, or to any agent or employee of such retail or wholesale licensee, that he or she is twenty-one (21) or more years of age for the purpose of entering licensed premises or inducing such retail or wholesale licensee, his agent or employee, to sell, serve or dispense beer to him or her shall be guilty of a misdemeanor.

Any person who shall by any means represent to any such retail or wholesale licensee, his agent or employee, that any other person is twenty-one (21) or more years of age, when in fact such other person is under the age of twenty-one (21) years, for the purpose of entering licensed premises or inducing such retail or wholesale licensee, his agent or employee, to sell, serve or dispense beer to such other person, shall be guilty of a misdemeanor.