BOOK I-GENERAL PART
TITLE II-THE ACT
CHAPTER I-BASES OF PUNISHABILITY
Article 17
Mistake about unlawfulness
1- A person acts without fault when he acts unaware of the unlawfulness of the act, if his mistake is not censurable.
2- If his mistake is censurable, the agent is punished with the sentence applicable to the respective intentional crime, which can be especially mitigated.
Mistake of law - national proceedings
EDIT.