local Commission Against Anti-Social Acts of Minors and Underage Persons, the court may also, after pronouncement of the sentence, substitute the commission to a correctional boarding school for another educational corrective measure. (3) The rule of paragraph (1) shall not apply: a) where the underage convict has committed a crime during the serving of punishment by deprivation of liberty, and b) where he has been convicted after completing full age. (4) The rule of paragraph (1) shall not be applied also in cases of second conviction, provided the court finds that for the correction and re- education of the perpetrator it is necessary for him to serve the sentence of imprisonment and where: a) the term is not less than six months, or b) the perpetrator has already served a punishment by imprisonment. Article 65 (1) Before reaching full age underage persons shall serve punishments by imprisonment in reformatory establishments. (2) (Amended, SG No. 75/2006) After reaching full age they shall be transferred to prison or prison hostel. In view of completing their education or vocational training, upon the proposal of the Pedagogical Council and with permission of the prosecutor, they may be admitted to reformatory establishment until completion of twenty years of age. Chapter Seven EXEMPTION FROM SERVING AN IMPOSED PUNISHMENT Section I Conditional Sentencing Article 66 (1) (Amended, SG No. 28/1982, corrected, SG No. 31/1982, amended, SG No. 92/2002, effective 1.01.2005 - amended, SG No. 26/2004, effective 1.01.2004) Where the court imposes punishment by imprisonment for up to three years, it may suspend the serving of the imposed punishment for a period of three to five years, provided the person has not been sentenced to imprisonment for a crime of general nature and if the court finds that for the purpose of achievement of the objectives of the punishment, and above all for correction of the convict it is not imperative for him to serve the punishment. (2) (Amended, SG No. 92/2002, effective 1.01.2005, - amended, SG No. 26/2004, effective 1.01.2004) The term of probation may not exceed the term of the imposed punishment by imprisonment by more than three years. (3) (Repealed, SG No. 92/2002, effective 1.01.2005 - amended, SG No. 26/2004, effective 1.01.2004). (4) (New, SG No. 28/1982, supplemented, SG No. 75/2006) The convict shall be obliged to work or study during the probation period, unless he has the obligation to undergo medical treatment. Article 67