FIRST VOLUME
General Provisions
SECOND CHAPTER
Essence of Criminal Responsibility
SECOND SECTION
Excusatory and Mitigating Causes
Mistake
ARTICLE 30-(1) A person executing an act without knowing factual means of offense defined in the law is not considered to have acted intentionally. The state of negligent responsibility is reserved due to such mistake.
(2) A person who is mistaken about the factual qualifications of an offense which require heavier or less punishment may take advantage of this mistake.
(3) A person who inevitably makes mistake about existence of conditions eliminating or diminishing criminal responsibility may take advantage of this mistake.
Mistake of fact - national proceedings
Mistake of law - national proceedings
EDIT.