Original: At its 1986 Ard Fheis, Sinn Féin delegates passed a resolution to amend the rules and constitution that would allow its members to sit in the Dublin parliament (Leinster House/D áil Éireann).
Simplified: At its 1986 Ard Fheis, Sinn Féin changed its and constitution to allow its members to sit in the Dublin parliament (Leinster House/D áil Éireann).