FIAC is made up of the associations of lay apostolate constituted on the national level, which correspond to the four notes, taken together, that are set out in the Decree of the Ecumenical Council Vatican II ApostolicamActuositatem, no.20, 2-3, and which therefore fit the re-definition contained in the post-Synodal ApostolicExhortation Christifideles Laici no. 31,3.