The National Minimum Drinking Age Act of 1984 withholds revenue from states that allow the purchase of alcohol by anyone under the age of 21. Prior to the effective date of that Act, the drinking age varied from state to state. Some states do not allow those under the legal drinking age to be present in liquor stores or in bars (usually, the difference between a bar and a restaurant is that food is served only in the latter). Contrary to popular belief, since the act went into law, only a few states prohibit minors and young adults from consuming alcohol in private settings. As of January 1, 2010, 15 states and the District of Columbia ban underage consumption outright, 17 states do not ban underage consumption, and the remaining 18 states have family member and/or location exceptions to their underage consumption laws.
Federal law explicitly provides for religious, medical, employment and private club possession exceptions; as of 2005, 31 states have family member and/or location exceptions to their underage possession laws. However, non-alcoholic beer in many (but not all) states, such as Idaho, Texas, and Maryland, is considered legal for minors (those under the age of 21).[16]
By a judge's ruling, South Carolina appears to allow the possession and consumption of alcohol by those 18 to 20 years of age, but a circuit court judge said otherwise.[17]
Some U.S. States have legislation that make providing to and possession of alcohol by minors (persons under 21) a gross misdemeanor with a potential of $5,000 and a year in jail (or more) [18]
See also: Minor in Possession