Native American Gaming Enterprises

Indian Gaming enterprises comprise gambling businesses operated on Indian reservations or tribal land, which have limited sovereignty and therefore the ability to exist outside of direct state regulation.
In 1987, in a case called Cabazon Band of Mission Indians v. California, the U.S. Supreme Court recognized that, as sovereign political entities, federally recognized Native American tribal [...]

Regulation under the IGRA

Source: http://www.lao.ca.gov/1998/12998_gambling/12998_gambling.html

Gambling activities permitted by the states

Source: http://www.lao.ca.gov/1998/12998_gambling/12998_gambling.html