BOOK I-GENERAL PART
TITLE II-THE ACT
CHAPTER II-FORMS OF CRIME
Article 25
Desistance in case of abetting
If various agents abet in the act, the attempt of he who voluntarily prevents the consummation or the verification of the act result is not punishable, nor the one who makes serious efforts to prevent the one and the other, even when the other participants proceed with the execution of the crime or consummate it.
EDIT.