The three tier system of alcohol regulation in the US gets its name from the three types of companies involved in this system: suppliers, wholesalers (also known as distributors) and retailers. The three tier regulation system means that, in most cases, only authorized retailers can sell alcoholic beverages directly to the public.

Tier 3 in the US’s three tier system of alcohol regulation includes all retailers. Retailers are companies who buy alcoholic beverages and sell them to the public, such as bars, restaurants or liquor stores. 

The three tier system of alcohol regulation in the US came about as a result of the Prohibition era. From 1920 to 1933, the US government banned the production, sale and movement of alcoholic beverages. Today, the three tier system separates the alcoholic beverage industry into three tiers (suppliers, wholesalers and retailers), and forbids financial investment between tiers.