Supreme Court decisions cannot be appealed, as such, to either court. The ECJ hears cases referred to it by the Irish Courts by way of preliminary ruling and while unsuccessful litigants before the Supreme Court can apply to the ECtHR, the latter court's decision does not have the effect of voiding the Supreme Court's decision. As a matter of Irish domestic law, a decision of the ECtHR does not override acts of the Oireachtas, but instead it must be brought to the attention of the Oireachtas, which may decide upon legislation or perhaps even a constitutional referendum to implement it.