Pope Pius XII agreed to the academic freedom to study the scientific implications of evolution, so long as Catholic dogma is not violated, in his encyclical Humani Generis he writes…
[quote:zwxjbbch]…the Teaching Authority of the Church does not forbid that, in conformity with the present state of human sciences and sacred theology, research and discussions, on the part of men experienced in both fields, take place with regard to the doctrine of evolution, in as far as it inquires into the origin of the human body as coming from pre-existent and living matter—for the Catholic faith obliges us to hold that souls are immediately created by God. However this must be done in such a way that the reasons for both opinions, that is, those favorable and those unfavorable to evolution, be weighed and judged with the necessary seriousness, moderation and measure, and provided that all are prepared to submit to the judgment of the Church, to whom Christ has given the mission of interpreting authentically the Sacred Scriptures and of defending the dogmas of faithful. Some however rashly transgress this liberty of discussion, when they act as if the origin of the human body from pre-existing and living matter were already completely certain and proved by the facts which have been discovered up to now and by reasoning on those facts, and as if there were nothing in the sources of divine revelation which demands the greatest moderation and caution in this question[/quote:zwxjbbch]
Regarding the strict requirement that you and Mr. Salza require of anyone who you would include or exclued from the Church, the Venerable Pope Pius XII writes further regarding any future scientific and theological development…

[quote:zwxjbbch]This certainly would be praiseworthy in the case of clearly proved facts; but caution must be used when there is rather question of hypotheses, having some sort of scientific foundation, in which the doctrine contained in Sacred Scripture or in Tradition is involved[/quote:zwxjbbch]
Like the writings of the Church Father’s the Pope when writing an encyclical does not envoke the charism of Infallibility, however he does warrent serious consideration when one is informing his or her thought on what the Church teaches.

A review of the CCC sections, Part I Section II Paragraph 4 ss 279-324, cover Creation, and does not make the same requirements that you and Mr. Salza do.

If the Catechism that was published by Pope John Paul II is not to your liking, then it’s primary source may better serve to show the Catholic position does not require the limited interpretation you would like to enforce. Please read the Catechism of the Council of Trent. Where nowhere is found a requirement to believe in six 24hr periods of creation. Read Article 1 of the Catechism.[url:zwxjbbch]http://www.cin.org/users/james/ebooks/master/trent/tindex.htm[/url:zwxjbbch]

Please give a De Fide statement that all Catholics must hold to the six day 24 hr creation from a Dogmatic Council, or other reliable source. Mr. Salza, while a good scholar, and revert, even if to the SPPX is not the Magisterium. While I find much of his writing to be orthodox, some of his conclusions, are personal opinion and not Dogmatic teachings. It is better to remain faithful to Peter, than those who tell us that Peter can be ignored, and they know better what the Church really means.