Catechism of the Catholic Church, 883
“The college or body of bishops has no authority unless united with the Roman Pontiff, Peter’s successor, as its head.”
First Vatican Council, Session IV, Chp. IV, p.IX
“If anyone says that the Roman Pontiff has merely an office of supervision and guidance, and not the full and supreme power of jurisdiction over the whole Church, and this not only in matters of faith and morals, but also in those which concern the discipline and government of the Church dispersed throughout the whole world; or that he has only the principal part, but not the absolute fullness, of this supreme power; or that this power of his is not ordinary and immediate both over all and each of the Churches and over all and each of the pastors and faithful: let him be anathema.”
catholiceducation.org/en/culture/catholic-contributions/the-bishop-and-the-conference.html
Cardinal Joseph Ratzinger
< “The decisive new emphasis on the role of the bishops is in reality restrained or actually risks being smothered by the insertion of bishops into episcopal conferences that are ever more organized, often with burdensome bureaucratic structures. We must not forget that the episcopal conferences have no theological basis, they do not belong to the structure of the Church, as willed by Christ, that cannot be eliminated; they have only a practical, concrete function.” >
< “Because it is a matter of safeguarding the very nature of the Catholic Church, which is based on an episcopal structure and not on a kind of federation of national churches. The national level is not an ecclesial dimension. It must once again become clear that in each diocese there is only one shepherd and teacher of the faith in communion with the other pastors and teachers and with the Vicar of Christ.” (The Ratzinger Report, 59-61) >
< While recognizing the legitimate aims of episcopal conferences, Pope John Paul II wrote:
“Such aims, however, require that an excessively bureaucratic development of offices and commissions operating between plenary sessions be avoided. The essential fact must be kept in mind that the Episcopal Conferences with their commissions and offices exist to be of help to the bishops and not to substitute for them.” (Apostolos Suos, 18)
In the same document, we find other affirmations of the value of episcopal conferences, but there is often a corresponding word of caution:
“Their importance is seen in the fact that they contribute effectively to unity between the bishops, and thus to the unity of the Church, since they are a most helpful means of strengthening ecclesial communion. Even so, the growing extent of their activities has raised some questions of a theological and pastoral nature, especially with regard to their relationship to the individual Diocesan bishops.” (Apostolos Suos, 6) >