(2) Educational recommendations may not last longer than one year. (3) Educational recommendations may be, during their execution, replaced with another or cancelled. (4) The selection and application of educational recommendations shall be done in co-operation with the juvenile’s parents or guardians and institutions of social welfare. Article 84 Criminal Sanctions for Juveniles (1) To a juvenile perpetrator of a criminal offence educational measures and certain security measures may be imposed, while to a senior juvenile the punishment of juvenile imprisonment may be exceptionally imposed. (2) To a juvenile who at the time of perpetration of a criminal offence had reached fourteen years of age but had not reached sixteen years of age (a junior juvenile) only educational measures may be imposed. (3) To a juvenile who at the time of perpetration of a criminal offence had reached sixteen years of age but had not yet reached eighteen years of age (a senior juvenile) educational measures may be imposed under conditions prescribed by this Code, and exceptionally a punishment of juvenile imprisonment may be imposed. (4) Security measures may be imposed on a juvenile under the conditions prescribed by this Code. (5) A suspended sentence or judicial admonition may not be imposed on a juvenile. Article 85 Purposes of Educational Measures and Juvenile Imprisonment The purpose of educational measures and of juvenile imprisonment is to ensure the education, rehabilitation and proper development of juveniles who have perpetrated criminal offences by extending protection, assistance and supervision to them, providing them with vocational training and developing their personal responsibility. In addition, the purpose of juvenile imprisonment is to exercise special influence on a juvenile perpetrator in order not to perpetrate criminal offences in the future, as well as to deter other juveniles from perpetrating criminal offences. Article 86 Types of Educational Measures (1) Educational measures are: a) Disciplinary measures; b) Measures of intensified supervision; c) Institutional measures. (2) Disciplinary measures shall be imposed on a juvenile perpetrator of a criminal offence, who does not need to be submitted to extended educational or reformatory measures, in particular if he has perpetrated a criminal offence out of thoughtlessness or frivolity. (3) Measures of intensified supervision shall be imposed on a juvenile perpetrator of a criminal offence, who needs to be submitted to extended measures of education, rehabilitation or treatment under adequate supervision, but where it is not necessary to completely isolate him from the old environment. (4) Institutional measures shall be imposed on a juvenile perpetrator of a criminal offence, who needs to be submitted to extended measures of education, rehabilitation or treatment, as well as completely detached from his old environment. Institutional measures may not last more than five years. Article 87 26