diminished due to any of the states of mind under the preceding paragraph, or due to any other permanent or severe mental disturbance. (4) The perpetrator, whose insanity was self-induced through indulgence in alcohol, drugs, or in any other ways, shall be deemed to be criminally liable if his guilt, which constitutes a statutory element of the offence in question, is established. Mistake of Fact Article 30 (1) The perpetrator who, at the time of the committing of a criminal offence, was not aware of a statutory element of such an offence, shall not be held liable under criminal law. (1) A criminal offence shall be deemed to be committed as a mistake of fact if the perpetrator at the time of committing of a criminal offence was not aware of a statutory element of the circumstances, or he erroneously believed that the circumstances were present which, if they were true, would justify his conduct. (3) For a criminal offence committed out of negligence, the guilt of the perpetrator shall not be excluded if he was in error regarding the circumstances, which he should and could have been aware of within the limits of required carefulness. Mistake of Law Article 31 (1) The perpetrator of a criminal offence shall not be held to be liable under criminal law if, for reasons which can be justified, he did not know that such an offence was unlawful. (2) There are no justified reasons referred to in paragraph 1 of this Article if the perpetrator was not aware of legal regulations, with which he could have familiarised himself under the same conditions as other people in his broader environment, or he should have known special legal regulations in relation to his work, role, or general position. (2) If the perpetrator committed a criminal offence deemed as a mistake of law, which he could have avoided, the court may reduce the sentence. Necessity Article 32 (1) Any person who shall commit an act, which shall have elements of a criminal offence to avert an immediate threat to his life, physical integrity, personal freedom or