Synodical Decree for Promoting Unity between the Assyrian Church of the East and the Chaldean Catholic Church 2001 Guidelines for Admission to the Eucharist Between the Chaldean Church and the Assyrian Church of the East Oriental Orthodox Churches Since 2003, the Catholic Church has engaged with the entire communion of Oriental Orthodox Churches as a whole, rather than with each autocephalous church in independent dialogues. Dialogue documents With individual Oriental Orthodox Churches: 1971 Common Declaration of Pope Paul VI and Mar Ignatus Jacob III of the Malankara Syrian Orthodox Church 1976 Common Christological Declaration of the Catholic Church and the Coptic Church 1984 Common Declaration of Pope John Paul II and Mar Ignatius Zakka I Iwas of the Malankara Syrian Orthodox Church 1989 Joint Statement of the Catholic and Malankara Orthodox Syrian Churches 1990 Doctrinal Agreement on Christology between the Catholic Church and the Malankara Orthodox Syrian Church 1993 Agreement and Pastoral Guidelines for Inter-Church Marriage between Catholics and Malankara Syrian Orthodox 1999 Joint Statement on the Synod of Diamper (AD 1599) by the Catholic and Malankara Orthodox Syrian Churches With the Oriental Orthodox Communion as a whole: 2009 Nature, Constitution, and Mission of the Church 2015 The Exercise of Communion in the Life of the Early Church and its Implications for our Search for Communion Today The Eastern Orthodox Churches The 1993 Balamand declaration of the Joint International Commission for Theological Dialogue Between the Catholic Church and the Orthodox Church discusses ecclesiological principles and suggests practical rules for both the Catholic Church and the Eastern Orthodox Churches to implement about improving relations by reciprocally avoiding interfering in each other's Churches and not using history in a polemical manner. According to Cardinal Edward Cassidy, the report contains three principles: that individuals have the freedom to follow their conscience, that Eastern Catholic Churches have the right to exist, that uniatism is not the current method of full communion; and two conclusions: that the Catholic Church and the Eastern Orthodox Churches are "sister churches" and that rebaptism should be avoided. The principle that "the inviolable freedom of persons and their obligation to follow the requirements of their conscience", is foundational, according to Cassidy, "and justifies both the personal choice to adhere to the Catholic Church or to the Orthodox Church, and offers the possibility of returning to the Catholic Church for those communities which in 1945–49 had been forced to convert by