or more penalties not amenable to an aggregate penalty, which the sentenced person has to serve as subsequent terms; the provision of Article 78 § 2 shall be applied if even one of the offences has been committed in the conditions specified in Article 64. § 2. Notwithstanding the conditions specified in Article 78 § 1 or 2, the sentenced person may be conditionally released after serving 15 years deprivation of liberty. Article 80. § 1. In case of conditional release, the portion of the penalty which remains to be served constitutes a probation period, which may not, however, be less than 2 or longer than 5 years. § 2. If the sentenced person is the person specified in Article 64 § 2, the probation period may not be shorter than 3 years. § 3. In a case of the conditional release of a person sentenced to deprivation of liberty for life, the probation period shall be 10 years. Article 81. In case of revocation of the conditional release, the sentenced person may not again be conditionally released before the lapse of one year from the date of committing him to the penal institution, and in case of the penalty of deprivation of liberty for life, before the lapse of 5 years. Article 82. If in the probation period and in the course of the following 6 months, the conditional release has not been revoked, the sentence shall be considered to have been served at the time of the conditional release. Article 83. A person sentenced to a penalty of limitation of liberty who has completed at least half of the adjudged penalty, respected the legal order, performed diligently the work ordered by the court, and fulfilled the obligations imposed upon him, may be relieved by the court from the rest of the penalty, 29