These restrictions created a small but lucrative black market in illegal alcohol, leading to the proliferation of illegal alcohol outlets in many urban areas; the so-called "sly grog shop". After the Federation of Australia in 1901, Australia's new constitution ruled that the Commonwealth of Australia had no power to legislate in this area, so each state enacted and enforced its own liquor licensing regulations. This meant the Prohibition lobby in Australia had to lobby each individual state government, and was unable to achieve any nationwide ban on the sale of alcohol. Although liquor sales remained heavily restricted for many years, Australia did not experience the many social ills, including the vast expansion of organised crime that resulted from Prohibition in the United States in the 1920s.