. cial Procedure the offender is to be deemed particularly dangerous to the life, health or freedom of another. (2) When a joint fixed-term sentence of imprisonment is imposed for two or more offences, a prerequisite for the decision referred to in subsection 1 is that at least one of the offences is mentioned in said subsection and that the sentence imposed for it separately would be a fixed-term sentence of imprisonment of at least three years. Section 12 – Reconsideration in court (780/2005) (1) A person ordered to serve the entire sentence shall be conditionally released after he or she has served five-sixths of the sentence if he or she is no longer deemed to be particularly dangerous to the life, health or liberty of another. Attention may also be paid to the undertaking of the prisoner to comply with the conditions of the medical treatment referred to in section 4 of the Probationary Liberty Act and of the possible other related treatment and support. Conditional release on the basis of this subsection may occur at the earliest when the prisoner has been in prison for three years. (628/2013) (2) Before conditional release the prisoner may be placed in probationary liberty under supervision. If the Criminal Sanctions Agency deems that, due to an offence that has become evident, or due to revocation of the consent referred to in section 23, subsection 1 of the Probationary Liberty Under Supervision Act, or due to revocation of the probationary liberty referred to in said Act, before the release on probationary liberty under supervision, the release referred to in subsection 1 should be reconsidered, it shall submit the matter to the Helsinki Court of Appeals for reconsideration. The same procedure shall apply in respect of matters related to the calculation of the term of sentence referred to in section 28 of the Probationary Liberty Under Supervision Act or Chapter 3, section 7 of the Imprisonment Act. (628/2013) [subsection 3 has been repealed; 628/2013.] (4) The Act on the Procedure for Release of Long-Term Prisoners applies to consideration of the matter in the Helsinki Court of Appeals. Section 13 – Probationary period of conditional release (780/2005) (1) A probationary period, which is equivalent to the length of the sentence remaining at the time of release, begins when a sentenced person is conditionally released. However, the maximum length of the probationary period is three years. (2) The probationary period of conditional release and the remaining sentence for a person sentenced to life imprisonment is three years. If a person who has served his or her entire sentence in prison commits an offence referred to in section 14, subsection 1 within three years of when he or she was released from serving the entire sentence in prison, this is an aggravated factor in sentencing.