Cantons of Switzerland the canton of Schwyz. Six of the 26 cantons are traditionally, but no longer officially, called "half-cantons" (, , , ). In two instances (Basel and Appenzell) this was a consequence of a historic division, whilst in the case of Unterwalden a historic mutual association, resulting in three pairs of half-cantons. The other 20 cantons were — and in some instances still are — though only in a context where it is needed to distinguish them from any half-cantons, typically termed "full" cantons in English. The historic half-cantons, and their pairings, are still recognizable in the first article of the
Cantons of Switzerland federal law. Areas specifically reserved to the Confederation are the armed forces, currency, the postal service, telecommunications, immigration into and emigration from the country, granting asylum, conducting foreign relations with sovereign states, civil and criminal law, weights and measures, and customs duties. Each canton has its own constitution, legislature, executive, police and courts. Similar to the Confederation, a directorial system of government is followed by the cantons. Most of the cantons' legislatures are unicameral parliaments, their size varying between 58 and 200 seats. A few legislatures also involve or did involve general popular assemblies known as "Landsgemeinden"; the use of