I thought it would be good to copy the limitaions on homebrewing in the US. The following was copied from Wikipedia.
Many homebrewing related articles and books mistakenly claim that, in 1979, President Jimmy Carter signed into law a bill explicitly allowing home beers and winemaking, which was at the time illegal as a holdover from the prohibition of alcoholic beverages (repealed in 1933). In fact, the U.S. Congress passed an Act in 1978 exempting a certain amount of beer brewed for personal or family use from taxation. President Carter signed the Act, which addressed other issues as well.
States remain free to restrict, or even prohibit, the manufacture of beer, mead, hard cider, wine and other alcoholic beverages at home. For example, Ala. Code § 28-1-1 addresses the illegal manufacture of alcoholic beverages in Alabama, and no other provision of Alabama law provides an exception for personal use brewing.
Ala. Code § 28-1-1 - "In all counties of the state it shall be unlawful for any person, firm or corporation to have in his or its possession any still or apparatus to be used for the manufacture of any alcoholic beverage of any kind or any alcoholic beverage of any kind illegally manufactured or transported within the state or imported into the state from any other place without authority of the alcoholic control board of the state, and any person, firm or corporation violating this provision or who transports any illegally manufactured alcoholic beverages or who manufactures illegally any alcoholic beverages shall, upon conviction, be punished as provided by law."
Interestingly, several homebrew stores operate in Alabama, so the status of homebrewing as an enforcement priority with the Alabama Alcoholic Control Board is unknown.
However, most states permit homebrewing, allowing 100 gallons of beer per person over the age of 21 per year and up to a maximum of 200 gallons per household annually when there are two or more adults residing in the household. Because alcohol is taxed by the federal governments via excise taxes, homebrewers are restricted from selling any beer they brew. This similarly applies in most Western countries.