Article 173 § 1 or 3, Article 197 § 3, Article 252 § 1 or 2 and in Article 280, may be liable under the provisions specified in this Code, if the circumstances of the case and the mental state of development of the perpetrator, his characteristics and personal situation warrant it, and especially when previously applied educational or corrective measures have proved ineffective. § 3. In the case specified in § 2, the penalty imposed may not exceed two-thirds of the statutory maximum penalty for the offence imputed to the perpetrator; the court may also apply an extraordinary mitigation of punishment. § 4. With regard to the perpetrator who commits a prohibited act after having attained 17 years of age but before having reached the age of 18 years, the court shall, instead of a penalty, adopt educational, therapeutic, or corrective measures prescribed for juveniles, if the circumstances of the case and the mental state of development of the perpetrator, his characteristics and personal situation warrant it. Article 11. § 1. The same act may constitute only one offence. § 2. If an act has features specified in two or more provisions of penal law, the court shall sentence the perpetrator for one offence on the basis of all concurrent provisions. § 3. In the case specified in § 2 the court shall impose the penalty on the basis of the provision providing for the most severe penalty, which shall not prevent the court from imposing other measures provided for in law on the basis of all concurrent provisions. Article 12. Two or more prohibited acts of conduct undertaken at short intervals with premeditated intent shall be regarded as one prohibited act; if the subject of the assault is a personal 4