A referendum on a United Ireland would also require prior approval for the proposal from both the House of Commons and the House of Lords.
The requirement that 60% of the electorate would need to approve a United Ireland effectively guarantees that any referendum held at this point on the issue would not pass.
The Bill states:
(1) A proposition to change constitutional or parliamentary arrangements that is the subject of a referendum in the United Kingdom is deemed to be disagreed to (notwithstanding the form in which the question appears on ballot papers) unless the following criteria are met.
(2) Before the referendum is held
(a) each House of Parliament passes a motion that the proposition be agreed to, and
(b) if in either House the motion is passed on a division, the number of members who vote in favour of the motion is equal to or greater than two thirds of the number of those who vote.
(3) The number of those who vote in the referendum is equal to or greater than 55% of all those on the current electoral register.
(4) The number of those who vote in favour of the proposition is equal to or greater than 60% of those who vote in the referendum.
A referendum on Unity was not agreed as a precondition for the return of the political parties to Stormont this week.
The proposed bill, which would effectively block a border poll, would be a blow to Sinn Féin’s assertion that the revival of Stormont would be a “beach-head” to Irish unity.