The two boys became the youngest convicted murderers in the history of the state earlier this year.
The Central Criminal Court has heard the earliest possible release date for Boy A and Boy B in the Ana Kriegel murder trial.
On Tuesday, Boy A received a life sentence for murdering the 14 year old, while Boy B was sentenced to 15 years detention for his role in her murder.
The earliest possible release date for Boy A is the 18th of June 2031, while for Boy B its the 18th of June 2027.
Both boys will be transferred to an adult prisons when they turn 18 in 2022.
The Judge also ordered a series progress reports on both boys be carried out every two years during their periods of detention.
He said that the court needs to be fully informed of efforts made by the boys towards rehabilitation when their respective review dates arrive.
The reports will include updates on their educational, psychological, and psychiatric progress.
Mr Justice Paul McDermott says its not for micromanaging their sentences, its for courts to have a clear view of what happened during the court of their detention.