b) Ten years for cases of imprisonment of between over three years and fifteen years; c) Fifteen years for cases of imprisonment of between over fifteen years and thirty years. 3. The statute of limitation for execution of a criminal judgement shall be calculated from the date the judgement takes legal effect. If during the time limits prescribed in Clause 2 of this Article, the sentenced person again commits a new crime, the past duration shall not be counted and the statute of limitations shall be recalculated as from the date the new crime was committed. If during the time limits provided for in Clause 2, this Article, the sentenced person deliberately escapes and is the subject of a search warrant, the duration of escape shall not be counted and the statute of limitation shall be recalculated as from the date such person surrenders him/herself or is arrested. 4. The application of statute of limitation to cases of life imprisonment or death sentence, after going through the period of fifteen years, shall be decided by chairman of the Supreme People•s Court at the request of the chairman of the Supreme People•s Procuracy. In cases where the application of the statute of limitation is not allowed, the death penalty shall be converted into the life imprisonment and the life imprisonment into thirty years of imprisonment. Article 56.- Non-application of statute of limitations for execution of judgement The statue of limitation for judgement execution shall not apply to crimes prescribed in Chapter XI and Chapter XXIV of this Code. Article 57.- Exemption from penalty execution 1. For persons sentenced to non-custodial reform, termed imprisonment, who have not executed their judgements but have recorded great achievements or suffered from dangerous disease and if such persons are no longer dangerous to the society, the court may decide, at the proposal of the Procuracy director, to exempt the person from the execution of the entire penalty. 2. Sentenced persons shall be exempt from penalty execution when they are granted a special parole or general amnesty. 3. For persons sentenced to imprisonment for less serious crimes who have been entitled to a reprieve as provided for in Article 61 of this Code, if during the period of reprieve they have recorded great achievements, the court, at the proposal of the Procuracy director, may decide to exempt them from penalty execution. 4. For persons sentenced for less serious crimes who have been entitled to a temporary suspension as provided for in Article 62 of this Code, if during the period