Grand Lodge jurisdictions are typically based on areas of civil government, with a separate Grand Lodge governing Masonic lodges within a particular national or state boundary. Each Grand Lodge functions independently of any other Grand Lodge, setting its own rules and rituals, and determining which other Grand Lodges to recognize. When two Grand Lodges recognize each other they are said to be "in Amity". "Amity" means that the two Grand Lodges recognize each other as being legitimate, and may allow Masons under one Grand Lodge to visit lodges of the other. A Grand Lodge that is not "in amity with" (or recognised by) another Grand Lodge will not permit its members to visit Lodges in the second Grand Lodge's jurisdiction, or vice versa. The cause of a lack of amity is usually due to a perceived or actual violation of one of the Landmarks of Freemasonry.