Question: Who could sign a decree declaring the author of Sacerdotalis Caelibatus a saint?

full_context: Document 1: Pope John XXIII: The 50th anniversary of his death was celebrated on 3 June 2013 by Pope Francis, who visited his tomb and prayed there, then addressing the gathered crowd and spoke about the late pope. The people that gathered there at the tomb were from Bergamo, the province where the late pope came from. A month later, on 5 July 2013, Francis approved Pope John XXIII for canonization, along with Pope John Paul II without the traditional second miracle required. Instead, Francis based this decision on John XXIII's merits for the Second Vatican Council. On Sunday, 27 April 2014, John XXIII and Pope John Paul II were declared saints on Divine Mercy Sunday.
Document 2: Pope Paul VI: Cardinal Augustin Bea, the head of the Secretariat for Promoting Christian Unity, added at the end of the visit, "Let us move forward in Christ. God wants it. Humanity is waiting for it." Unmoved by a harsh condemnation by the Congregation of Faith on mixed marriages precisely at this time of the visit, Paul VI and Ramsey appointed a preparatory commission which was to put the common agenda into practice on such issues as mixed marriages. This resulted in a joint Malta declaration, the first joint agreement on the Creed since the Reformation. Paul VI was a good friend of the Anglican Church, which he described as "our beloved sister Church". This description was unique to Paul and not used by later popes.
Document 3: Pope Paul VI: Paul VI revolutionized papal elections by ordering that only cardinals below the age of eighty might participate in future conclaves. In Ecclesiae Sanctae, his motu proprio of 6 August 1966, he further invited all bishops to offer their retirement to the pontiff no later than the completion of their 75th year of age. This requirement was extended to all Cardinals of the Catholic Church on 21 November 1970. With these two stipulations, the Pope filled several positions with younger bishops and cardinals, and further internationalized the Roman Curia in light of several resignations due to age.
Document 4: Pope Paul VI: Of his eight encyclicals, Pope Paul VI is best known for his encyclical Humanae vitae (Of Human Life, subtitled On the Regulation of Birth), published on 25 July 1968. In this encyclical he reaffirmed the Catholic Church's traditional view of marriage and marital relations and a continued condemnation of artificial birth control. There were two Papal committees and numerous independent experts looking into the latest advancement of science and medicine on the question of artificial birth control. which were noted by the Pope in his encyclical The expressed views of Paul VI reflected the teachings of his predecessors, especially Pius XI, Pius XII and John XXIII and never changed, as he repeatedly stated them in the first few years of his Pontificate
Document 5: Pope Paul VI: Paul VI did renounce many traditional symbols of the papacy and the Catholic Church; some of his changes to the papal dress were reversed by Pope Benedict XVI in the early 21st century. Refusing a Vatican army of colourful military uniforms from centuries, he got rid of them. He became the first pope to visit five continents. Paul VI systematically continued and completed the efforts of his predecessors, to turn the Euro-centric Church into a Church of the world, by integrating the bishops from all continents in its government and in the Synods which he convened. His 6 August 1967 motu proprio Pro Comperto Sane opened the Roman Curia to the bishops of the world. Until then, only Cardinals could be leading members of the Curia.
Document 6: Pope Paul VI: Sacerdotalis caelibatus (Latin for "Of the celibate priesthood"), promulgated on 24 June 1967, defends the Catholic Church's tradition of priestly celibacy in the West. This encyclical was written in the wake of Vatican II, when the Catholic Church was questioning and revising many long-held practices. Priestly celibacy is considered a discipline rather than dogma, and some had expected that it might be relaxed. In response to these questions, the Pope reaffirms the discipline as a long-held practice with special importance in the Catholic Church. The encyclical Sacerdotalis caelibatus from 24 June 1967, confirms the traditional Church teaching, that celibacy is an ideal state and continues to be mandatory for Roman Catholic priests. Celibacy symbolizes the reality of the kingdom of God amid modern society. The priestly celibacy is closely linked to the sacramental priesthood. However, during his pontificate Paul VI was considered generous in permitting bishops to grant laicization of priests who wanted to leave the sacerdotal state, a position which was drastically reversed by John Paul II in 1980 and cemented in the 1983 Canon Law that only the pope can in exceptional circumstances grant laicization.
Document 7: Pope Paul VI: In December 2013, Vatican officials approved a supposed miracle that was attributed to the intercession of the late pontiff which was the curing of an unborn child in California, U.S.A in the 1990s. It was expected that Pope Francis would approve the miracle in the near future, thus, warranting the beatification of the late pontiff. In February 2014, it was reported that the consulting Vatican theologians to the Congregation for the Causes of Saints recognized the miracle attributed to the late pontiff.
Document 8: Pope Paul VI: Ecclesiam suam was given at St. Peter's, Rome, on the Feast of the Transfiguration, 6 August 1964, the second year of his Pontificate. It is considered an important document, identifying the Catholic Church with the Body of Christ. A later Council document Lumen Gentium stated that the Church subsists in the Body of Christ, raising questions as to the difference between "is" and "subsists in". Paul VI appealed to "all people of good will" and discussed necessary dialogues within the Church and between the Churches and with atheism.
Document 9: Casti connubii: Casti connubii (Latin: "of chaste wedlock") was a papal encyclical promulgated by Pope Pius XI on 31 December 1930 in response to the Lambeth Conference of the Anglican church. It stressed the sanctity of marriage, prohibited Catholics from using any form of artificial birth control, and reaffirmed the prohibition on abortion. It also explained the authority of Church doctrine on moral matters, and advocated that civil governments follow the lead of the Church in this area.
Document 10: Pope Paul VI: On 20 December 2012, Pope Benedict XVI, in an audience with the Cardinal Prefect of the Congregation for the Causes of Saints, declared that the late pontiff had lived a life of heroic virtue, which means that he could be called "Venerable". A miracle attributed to the intercession of Paul VI was approved on 9 May 2014 by Pope Francis. The beatification ceremony for Paul VI was held on 19 October 2014, which means that he can now be called "Blessed". His liturgical feast day is celebrated on the date of his birth, 26 September, rather than the day of his death as is usual.
Document 11: Pope Paul VI: Paul VI supported the new-found harmony and cooperation with Protestants on so many levels. When Cardinal Augustin Bea went to see him for permission for a joint Catholic-Protestant translation of the Bible with Protestant Bible societies, the pope walked towards him and exclaimed, "as far as the cooperation with Bible societies is concerned, I am totally in favour." He issued a formal approval on Pentecost 1967, the feast on which the Holy Spirit descended on the Christians, overcoming all linguistic difficulties, according to Christian tradition.
Document 12: Pope Paul VI: Paul VI opened the third period on 14 September 1964, telling the Council Fathers that he viewed the text about the Church as the most important document to come out from the Council. As the Council discussed the role of bishops in the papacy, Paul VI issued an explanatory note confirming the primacy of the papacy, a step which was viewed by some as meddling in the affairs of the Council American bishops pushed for a speedy resolution on religious freedom, but Paul VI insisted this to be approved together with related texts such as ecumenism. The Pope concluded the session on 21 November 1964, with the formal pronouncement of Mary as Mother of the Church.
Document 13: Pope Paul VI: In 1916, he entered the seminary to become a Roman Catholic priest. He was ordained priest on 29 May 1920 in Brescia and celebrated his first Holy Mass in Brescia in the Basilica of Santa Maria delle Grazie. Montini concluded his studies in Milan with a doctorate in Canon Law in the same year. Afterwards he studied at the Gregorian University, the University of Rome La Sapienza and, at the request of Giuseppe Pizzardo at the Accademia dei Nobili Ecclesiastici. At the age of twenty-five, again at the request of Giuseppe Pizzardo, Montini entered the Secretariat of State in 1922, where he worked under Pizzardo together with Francesco Borgongini-Duca, Alfredo Ottaviani, Carlo Grano, Domenico Tardini and Francis Spellman. Consequently, he spent not a day as a parish priest. In 1925 he helped found the publishing house Morcelliana in Brescia, focused on promoting a 'Christian inspired culture'.
Document 14: Sacerdotalis caelibatus: Sacerdotalis caelibatus (Latin for "Of priestly celibacy") is an encyclical written by Pope Paul VI. It defends the Catholic Church's tradition of clerical celibacy in the West. The encyclical was dated 24 June 1967.
Document 15: Pope Paul VI: On 24 April 2014, it was reported in the Italian magazine Credere that the late pope could possibly be beatified on 19 October 2014. This report from the magazine further stated that several cardinals and bishops would meet on 5 May to confirm the miracle that had previously been approved, and then present it to Pope Francis who may sign the decree for beatification shortly after that. The Congregation for the Causes of Saints held that meeting and positively concluded that the healing was indeed a miracle that could be attributed to the late pope. The matter shall now soon be presented to the pope for approval.
ground_truth: Pope Francis
sub_queries: Sacerdotalis Caelibatus >> author Answer: Paul VI
Who was required to sign a decree declaring Paul VI a saint? Answer: Pope Francis