The House of Chiefs in Fiji consists of the Fijian nobility, composed of about seventy chiefs of various ranks, majority of which are related. It is not a formal political body and is not the same as the former Great Council of Chiefs, which was a political body with a prescribed constitutional role, although the membership of the two bodies did overlap to a great extent. The social hierarchy Fijian society is traditionally very stratified. A hierarchy of chiefs presides over villages (koro), sub-districts (tikina vou), districts (tikina cokavata), and provinces (yasana). These administrative divisions generally correspond roughly with the social units of the extended family (tokatoka), clan (mataqali), tribe (yavusa), and land (vanua). Each mataqali is presided over by a chief, styled Ratu if male or Adi (pronounced Ahn-di) if female. Chiefs presiding over units above the mataqali have other, more prestigious titles, although they, too, are typically addressed and referred to as Ratu or Adi, although there are regional variations. In Rewa, Ro is used instead of Ratu and Adi, while in the Lau Islands Roko is used. In Kadavu Group and in the west of Fiji, Bulou substitutes for Adi. The method of appointing chiefs is not uniform, although the position is generally held for life (with some exceptions) and there is a hereditary element, although the son of a chief does not automatically succeed to the position on his father's death. A chief may hold more than one title, just as a peer may in the United Kingdom; the late Ratu Sir Kamisese Mara, for example, was both Tui Nayau and Tui Lau. Provinces and confederacies For administrative purposes, Fiji is divided into fourteen provinces, each of which has a Provincial Council in which the chiefs from the province are represented, along with commoners. Each Provincial Council is headed by a Roko Tui, whose appointment must be approved by the Fijian Affairs Board, a government department, which must also approve all bylaws passed and taxes levied by the Councils. (Titles can be deceptive: not every chief styled Roko Tui heads a Provincial Council). The Provincial Councils are significant in that they not only administer communally owned land (more than 80 percent of Fiji's total land area), but also elected most of the representatives to the Great Council of Chiefs. Moreover, the Great Council of Chiefs, which was charged with choosing 14 of the 32 members of