Amendment 21: Repeal of Prohibition
In the beginning of the Amendment 21 it repealed Amendment 18 because the amendment wasn't really working. Then it stated that the states had to create their own laws that monitered the use or alcohol, so the government didn't have to create one certain law and then expect everybody to follow it. So instead the government just said moniter the alcohol use and make the laws reasonable. At the end of the amendment it just explains the proccess of ratification and repeal of the amendment. The amendment was proposed because of issues with the 18th amendment.
The 21st amendment was passed by Congress on February, 20th, 1933 then was ratified by the states and went into effect on December 5th, 1933. The amendment was proposed in 1932 though. No changes were made to the 21st amendment.