Found the actual Pontifical Biblical Commission statements:
On the Mosaic Authorship of the Pentateuch (June 27, 1906)
I: Are the arguments gathered by critics to impugn the Mosaic authorship of the sacred hooks designated by the name of the Pentateuch of such weight in spite of the cumulative evidence of many passages of both Testaments, the unbroken unanimity of the Jewish people, and furthermore of the constant tradition of the Church besides the internal indications furnished by the text itself, as to justify the statement that these books are not of Mosaic authorship but were put together from sources mostly of post-Mosaic date?
Answer: In the negative.
II: Does the Mosaic authorship of the Pentateuch necessarily imply a production of the whole work of such a character as to impose the belief that each and every word was written by Moses' own hand or was by him dictated to secretaries; or is it a legitimate hypothesis that he conceived the work himself under the guidance of divine inspiration and then entrusted the writing of it to one or more persons, with the understanding that they reproduced his thoughts with fidelity and neither wrote nor omitted anything contrary to his will, and that finally the work composed after this fashion was approved by Moses, its principal and inspired author, and was published under his name?
Answer: In the negative to the first and in the affirmative to the second part.
III: Without prejudice to the Mosaic authorship of the Pentateuch, may it be granted that in the composition of his work Moses used sources, written documents namely or oral traditions, from which in accordance with the special aim he entertained and under the guidance of divine inspiration he borrowed material and inserted it in his work either word for word or in substance, either abbreviated or amplified?
Answer: In the affirmative.
IV: Subject to the Mosaic authorship and the integrity of the Pentateuch being substantially safeguarded, may it be admitted that in the protracted course of centuries certain modifications befell it, such as: additions made after the death of Moses by an inspired writer, or glosses and explanations inserted in the text, certain words and forms changed from archaic into more recent speech, finally incorrect readings due to the fault of scribes which may be the subject of inquiry and judgement according to the laws of textual criticism?
Answer In the affirmative, saving the judgement of the Church.
Document listed on the Vatican website: 33. De mosaica authentia Pentateuchi (June 27, 1906)