29 f) at least a half of a term of penalty inflicted by a court for a especially serious crime, if a person was previously convicted for an intentional crime. (As amended by the Law of 29.08.2001). If a person, to whom a conditional early release was applied, during unserved term of a penalty, commits a new intentional crime, a court shall inflict a penalty as envisaged by Article 60 and 86 of this Code. Article 90. Mitigation of Penalty Person convicted to imprisonment or correctional labor for a crime committed before eighteen of age, an unserved term of a penalty may be substituted with a more lenient one. Mitigation of penalty may be applied to convicted in the instance if he meets requirements of established order of penalties envisaged by Paragraph 1 of this Article and bona fide labor or study, Mitigation of penalty may be applied after actual completion by convicted of: a) at least a fifth of a penalty inflicted by a court for a crime of a minor social danger or less serious; b) at least a quarter of a penalty inflicted by a court for a serious crime as well as an intentional crime, if a person has been previously convicted to imprisonment for an intentional crime; c) at least a third of a penalty inflicted by a court for a especially serious crime as well as for an intentional crime, if a person was previously convicted to imprisonment for an intentional crime. (As amended by the Law of 29.08.2001). When substituting an unserved term of imprisonment with correctional labor, the latter shall be imposed within time limits established for that type of penalty, and shall not exceed unserved term of imprisonment. A conditional early release may be applied to persons, in respect of whom a penalty was mitigated as envisaged by Article 89 of this Code, after completion of an appropriate more lenient term of a penalty. If a person, whose penalty was mitigated, during unserved term of a penalty, commits a new intentional crime, a court shall inflict a penalty as envisaged by Article 60 and 89 of this Code. SECTION SEVEN. COMPULSORY MEDICAL MEASURES CHAPTER 17. GROUNDS FOR AND APPLICATION OF COMPULSORY MEDICAL MEASURES Article 91. Purposes of Compulsory Measures Compulsory medical measures may be applied to mentally diseased persons, who committed socially dangerous acts, with a purpose of medical treatment and prevention of committing of new socially dangerous acts by those persons. Compulsory medical measures may be applied by a court to persons suffering from alcohol, drugs, and toxic substances addiction, for treatment thereof and achieving the goals of penalty. Article 92. General Grounds for Application of Compulsory Medical Measures