The former Yugoslav Republic of Macedonia
GENERAL PART
2. A CRIME AND CRIMINAL RESPONSIBILITY
2.1. General provisions on crime and criminal responsibility
Mistake of law
Article 17
(1) The perpetrator of a crime is not criminally responsible for an act if for justified reasons he did not know and he could not have known that this act is prohibited.
(2) If the offender could have known that this act is prohibited, he may be punished more leniently.
Mistake of law - national proceedings
EDIT.