According to Canon Law (Church Law) the Vatican Secretary of State has to be a Catholic; a person in communion with the Catholic Church.
Cardinal Tarcisio Bertone is in public heresy and is not in communion with the Church.
The cardinal in a public letter denied the need for Jews needing to convert into the Catholic Church to go to Heaven and avoid Hell.He said the Good Friday Prayer Revised by Pope Benedict XVI is not for the conversion of the Jews in the present time. He also mentioned that there was no active effort to convert Jews. This is contrary to Jesus' call to proclaim the Good News and that those 'who do not believe will be condemned.'
This is a denial of Jesus and the Church. It is accepting the Jewish Left position that the Messiah has not yet come and that Jews can continue to actively convert Christians.
His statement is also contrary to ecumenism with the Orthodox Churches and Protestant and evangelical communities.
This is a rejection of the teachings of the Bible, the Creed, Vatican Council II (Ad Gentes 7,Lumen Gentium 14) ,the ordinary magisterium of Pope John Paul II and the ex cathedra dogma extra ecclesiam nulla salus.He has lost the right to hold a juridical office.
A person who does not believe or affirm the Creed or fundamental moral and faith teachings of the Roman Catholic Church cannot be a Rector a Religious Superior or hold such an office according to Canon Law.
So how can Cardinal Bertone who is 'technically' not a Catholic remain in office as Secretary of State and as a cardinal?