Prohibition
Prohibition in the United States focused on the manufacture, transportation, and sale of alcoholic beverages; however, exceptions were made for medicinal and religious uses. Alcohol consumption was never illegal under federal law. Nationwide Prohibition did not begin in the United States until January 1920, when the Eighteenth Amendment to the U.S. Constitution went into effect. The 18th amendment was ratified in 1919, and was repealed in December 1933 with the ratification of the Twenty-first Amendment.
Three-tier system (alcohol distribution)
In 1933 the 18th Amendment was repealed by the 21st Amendment. (Previously, the 18th Amendment had outlawed alcohol in the US in 1919 and led to Prohibition in 1920.) Section 2 of the 21st Amendment specifies that the power to control alcohol resides with the states, leaving each state to decide when and how to repeal Prohibition.