BOOK SECOND
LAWS OF CRIMINAL PROCEDURE
PART III OF MATTERS APPLICABLE TO ALL CRIMINAL TRIALS
Title II OF CONFESSIONS
658. Any confession made by the person charged or accused, whether in writing or orally, may be received in evidence against the person who made it, provided it appears that such confession was made voluntarily, and not extorted or obtained by means of threats or intimidation, or of any promise or suggestion of favour.
659. (1) If a confession is reduced to writing at the time it is made, the writing shall be produced; and only if it is proved that the writing has been destroyed or lost, may oral evidence, in lieu of such writing, be admitted for the purpose of proving the substance of such confession.
(2) Nothing in this article shall operate as a bar to the admissibility in evidence of any other confession verbally made before or after.
660. When only a part of a writing or of an oral statement is read or given in evidence against the accused, he shall have the right to insist that the whole of the writing or oral statement be read or given in evidence; but credit may be given to that part only of such writing or oral statement as may be considered worthy of credit.
661. A confession shall not be evidence except against the person making the same, and shall not operate to the prejudice of any other person.
National proceedings on admission of guilt
EDIT.