The basic unit of the ACS is the Centre, which groups together the Cooperators working in a given territory, forming the living cell of the Association, and the place for formative and operational exchange. The life and work of the centre are governed and animated by the local council. Centres are grouped by Province, and are accountable to the Salesians' Inspectorate ("Province"), and animated by the Inspectorate Council. The Country or Region which ensures contact and communion between the various Inspectorates is created as a National Conference in countries with a large number of Cooperators (Italy, Spain, Poland and Argentina), and as a Regional Conference in countries like India and Brazil. The World Convention, made up of one member elected for each Region of the Salesian Congregation, and five members appointed by the Rector Major, is responsible for animating the whole Association and coordinating the educational and apostolic activities under the guidance of the Rector Major.