Religion should not act as a barrier to accessing state-funded schools, according to Equate.
The children and family rights organisation will attend a forum today which is discussing the role of religion in Primary School admissions.
The forum has been announced by Education Minister Richard Bruton as part of a wider consultation process on the issue.
Director of Equate Michael Barron says a number of groups will participate.
"We've been invited to be a part of a Department of Education forum in Croke Park today, bringing together various stakeholders who have an interest in the area.
"We'll be there together with a significant number of equality and children's rights organisations, and we'll be making the case - it's time for the baptism barrier to end and for religion to no longer be a criteria for children accessing state-funded schools," he said.