Where an act is committed because of a mistake of facts, the liability of the perpetrator shall be restricted to the facts which he believed they existed, if such facts are to negate or reduce his liability, provided that his belief was based on reasonable causes and on a real effort of search and investigation. But if the mistake which caused the perpetrator to believe he is not liable is due to his negligence or lack of precaution, he shall be held responsible for a non-premeditated crime, if the law punishes the act as being such .
Interpretation and application must be checked against the official text and current version.