The Supreme Court has dismissed an appeal in a case involving a boy from the Traveller community who was refused admission to the Christian Brothers High School in Clonmel, Co Tipperary in 2010.
Mary Stokes, the boy's mother, had argued that a school policy which gave preference to the children of past pupils discriminated indirectly against Traveller children.
The boy's father, a Traveller, was not a past pupil of the school.
The Equality Tribunal found that the school's policy discriminated indirectly against Travellers.
However, both the Circuit Court and the High Court rejected that finding, decisions that were this morning upheld by the Supreme Court.
The court ruled that insufficient evidence had been put before previous hearings at the Equality Tribunal and at the Circuit Court.
It found it was therefore not possible to carry out a proper analysis.
Two of the five Supreme Court judges took a different view; that equality legislation meant that no appeal to the Supreme Court was allowed.
Reacting to the decision, Brigid Quilligan of the Irish Traveller Movement said Ms Stokes had taken the case on behalf of her son and of all Traveller children.
She said there was not a level playing field for all children to access education.
The school said it was very happy that its admissions policy had been upheld.