The members and chairman of the Prize Committee are normally elected for a term of three years, giving the chairman the decisive vote in case of a split Committee. In order to ascertain continuity no more than two members should be replaced in a given year. A chairman cannot be reelected for a consecutive term, but Committee membership can be extended for an additional three-year period. In exceptional cases it is possible to be reelected for a third consecutive term. After an interim of at least three years a previous Committee member can once more be elected.