The Watch Tower Bible and Tract Society of Pennsylvania is the main legal body used around the world by Jehovah's Witnesses to organize the religion and also to decide on its official list of beliefs. Members of Jehovah's Witnesses usually call it just as "the Society". Its headquarters are in Brooklyn, New York in the United States and its rules allow only between 300 and 500 members. All of them must be "mature, active and faithful" male Jehovah's Witnesses.