The High Court has ruled that the verdict of unlawful killing will be available to the jury in the Stardust Inquest.
48 people died following the nightclub fire in Artane in Dublin in 1981.
128 others were injured in the Valentine's Night disco.
Most of the victims were aged between 18 and 25.
In 2019 new inquests were ordered into the deaths.
But they were delayed after the Stardust's former manager Eamon Butterly brought the court challenge, arguing the verdict shouldn't be open to the jury.