These are the U.S laws
For minors
Minors who purchase, attempt to purchase, possess, or consume alcoholic beverages, as well as minors who are intoxicated in public or misrepresent their age to obtain alcoholic beverages, face the following consequences:
Class C misdemeanor, punishable by a fine up to $500
Alcohol awareness class
8 to 40 hours community service
30 to 180 days loss or denial of driver's license
If a minor is seventeen years of age or older and the violation is the third offense, the offense is punishable by a fine of $250 to $2,000, confinement in jail for up to 180 days or both, as well as automatic driver's license suspension.
A minor with previous alcohol-related convictions will have his or her driver's license suspended for one year if the minor does not attend alcohol awareness training that has been required by the judge.
Consequences for adults who provide
Adults and minors who give alcohol to a minor also face a stiff penalty. The punishment for making alcoholic beverages available to a minor is a class A misdemeanor, punishable by a fine up to $4,000, confinement in jail for up to a year, or both. Additionally, the violator will have his or her driver´s license automatically suspended for 180 days upon conviction.
Persons 21 or older (other than the parent or guardian) can be held liable for damages caused by intoxication of a minor under 18 if the adult knowingly provided alcoholic beverages to a minor or knowingly allowed the minor to be served or provided alcoholic beverages on the premises owned or leased by the adult.
Sale to a minor is a class A misdemeanor, punishable by a fine up to $4,000, confinement up to a year in jail, or both.