Jus novum (c. 1140-1563) Jus novissimum (c. 1563-1918) Jus codicis (1918-present) Other Sacraments Sacramentals Sacred places Sacred times Supra-diocesan/eparchal structures Particular churches Juridic persons Philosophy, theology, and fundamental theory of Catholic canon law Clerics Office Juridic and physical persons Associations of the faithful Pars dynamica (trial procedure) Canonization Election of the Roman Pontiff Academic degrees Journals and Professional Societies Faculties of canon law Canonists Institute of consecrated life Society of apostolic life Acta Apostolicae Sedis (Latin for 'Acts of the Apostolic See'), often cited as AAS, is the official gazette of the Holy See,[1] appearing about twelve times a year.

[2] It was established by Pope Pius X on 29 September 1908 with the decree Promulgandi Pontificias Constitutiones, and publication began in January 1909.

However, this changed when on 23 May 1904 the AAS was declared an organ of the Holy See by Pius X, to the extent that all documents printed in it were considered "authentic and official"; those dispositions were put in place beginning with vol.

Since 1929, Acta Apostolicae Sedis can have a supplement in Italian, called Supplemento per le leggi e disposizioni dello Stato della Città del Vaticano, containing laws and regulations of Vatican City, the city-state founded the same year.

In accordance with paragraph 2 of the Legge sulle fonti del diritto of 7 June 1929,[10] the laws of the state are promulgated by being included in this supplement.