Another two referendums likely this year
Friday's referendum was the first of seven questions on the Constitution to be put to people in the near future, with two referendums expected later this year.
The electorate is due to vote on the removal of blasphemy as an offence and also on the reference in the Constitution to the place of women in the home.
It is planned to hold both votes in the autumn on the same day of the presidential election, if one is held.
Article 40.6.1(i) of the Constitution states "the publication or utterance of blasphemous, seditious, or indecent matter is an offence which shall be punishable in accordance with law". The removal of the reference to blasphemy has proved complex but work is continuing in the Department of Justice on the proposals to allow a referendum to take place.