The Supreme Court has refused to hear a Dublin woman's challenge to May’s abortion referendum result.
Joanna Jordan from Dún Laoghaire had taken the case in the lower courts.
She alleged that the register of electors was overstated, and also raised concerns over members of the Government taking part in the Yes campaign.
The High Court rejected her application earlier this year, and the Supreme Court won’t allow her to appeal that decision.
The court found that settled case law "makes clear that members of the Government are entitled to engage" in the referendum process.
It added that it was hard to disagree with the Court of Appeal's suggestion that the evidence concerning the register of voters was 'flimsy'.
Taoiseach Leo Varadkar today welcomed the news, saying it means the Government can now press ahead with the new laws.
The Taoiseach explained: "That allows us now as a Government to bring forward the legislation to allow for abortion in Ireland in certain circumstances when the Dáil returns.
"We're on track, as we planned, to have that legislation through in the next parliamentary session, and the services available to Irish women who need it in January."
Health Minister Simon Harris also said that plans remain on track in the wake of today's Supreme Court decision.
Today’s Supreme Court decision now means we can get on with acting on the people’s instruction in the referendum to repeal the 8th amendment and care for women in our own country. Lots of work ahead. Plans remain on track. Pass the legislation in this Dáil session.
— Simon Harris TD (@SimonHarrisTD) September 7, 2018