In 2017, it was decided that the Restored Gregorian Liturgy and the English Liturgy were to be the main liturgies celebrated by ROCOR Western Rite parishes going forward. Parishes that were using the Ambrosian or other forms were approved on a case-by-case basis. Within , on a limited basis, the "Saint Colman Prayer Book" has been authorized by Metropolitan Hilarion Kapral for use within the Diocese of Sydney, Australia and New Zealand. It has since received permission for limited use within other dioceses. The Book includes the Sarum rite, English rite, and Gregorian rite liturgies, together with a simplified version of the monastic hours. Most of the occasional services required by a Parish Priest through the course of the year are there, as well as the Rites of Holy Week and a Lectionary. originally under the auspices of the Holy Synod of Milan and edited by Hieromonk Aidan Keller, for liturgical use. They contain complete forms for celebration of the Liturgy or Mass, the Divine Office, the Mysteries or Sacraments, and many other services, with full chant notation. In December 2008, the St. Gregory's Press edition was also blessed for actual usage; these contains full forms, with complete chant notation, for the celebration of the Liturgy or Mass and of the Divine Office, i.e., the Canonical Hours.