An application by three men to stop the two referendums from going ahead tomorrow has been dismissed by the Supreme Court.
The High Court had earlier refused the application.
The men, who represented themselves in court, claimed that Article 46.4 of the Constitution prevented two proposals to amend it from being put to the people on the same day.
Harry Rea told High Court President Mr Justice Nicholas Kearns that when Eamon De Valera was president he had said the people should not be offered two separate items on the same day.
They asked the court to restrain the holding of the referendums.
Mr Justice Kearns said the three men had misconstrued Article 46 and what it actually meant was that a bill to amend the Constitution should not contain any other law making provision.
He dismissed their application.