The St. Margaret of Castello Chapter is a fraternity affiliated with the Holy Name of Jesus (Western Dominican) Province, that makes up 11 Western States. It is one of four provinces in the United States and one in Canada. The four U.S. Provinces and the Province of Canada send representatives to a periodic meeting (approx. every 18 months) for North American provinces, called the Dominican Laity Inter-Provincial Council (DLIPC).
An international body of Lay Dominicans, with one representative from various areas in the world, meeting annually, called the International Council of Lay Dominican Fraternities (ICLDF).
The Master of the Order and his Curia are housed in Rome at Santa Sabina, who has jurisdiction over the entire Order of Preachers including the laity.