The joint Ireland-Britain Euro 28 bid will proceed even if the Casement Park rebuild isn't completed in time.
And the FAI and the rest of the five 'home nations' have also submitted a proposal to UEFA looking for three automatic qualification spots if the bid is successful. Turkey provides the opposition but the Ireland-Britain bid is favourite to succeed when UEFA make a decision in September 2023.
If that proves to be the case and UEFA grants only two automatic spots for the finals, the FAI - having put forward the Aviva Stadium and Croke Park as match venues - is optimistic that the Republic of Ireland will take one along with England.
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The FAI want to host eight tournament games, including a quarter-final.
However, there is uncertainty over when Casement Park, the IFA's nominated match venue, will be rebuilt.
Work on the still-not-fully demolished Ulster GAA ground in Belfast that was last in operation over a decade ago was expected to begin after a legal challenge was dismissed last May.
But the cost is now estimated to be around double the initial £75m cost that was to be split between the Northern Ireland executive and the GAA.
With the executive still not up and running, uncertainty remains and Windsor Park is not an option as its 18,000 capacity is 12,000 short of UEFA requirements.
"Everyone is really supportive of having matches in Northern Ireland, we really want it to happen," said Noel Mooney, the Welsh FA's Irish CEO.
"Casement Park is the option. What they have put forward, all I have seen is Casement Park. Hopefully that is built and is ready for Euro 2028
"Obviously what happens in the government up there is not great.
"But I was at a meeting this week where civil servants from Northern Ireland were very positive about what we are trying to do, that it goes in the right direction.
"Whatever the legal stuff is around Casement Park, for example, we really want Northern Ireland to host matches, all of us.
"We're just hopeful they can get it over the line and get whatever arrangement to host matches in Northern Ireland.
"They are very much part of the bid. I never discussed them not being part of the bid.
"If, for whatever reason, Casement Park is not built you would still want them part of the bid. In a tournament sometimes you do other things other than hosting matches.
"It would be really disappointing if we hosted the Euros without games in Northern Ireland."
The FAI's Jonathan Hill is to meet virtually with the other home nations CEOs, including Mooney, who is keen that the Cardiff City (Millennium Stadium) hosts the opening game if the bid is successful.
Mooney claims that there is strong unity between the associations but it remains to be seen if that is the case if UEFA grants two automatic qualifying spots among the 24 teams to make the finals.
He also insists that Wales' aim is to qualify on merit but, if that doesn't happen, Mooney speculates that UEFA will make performance in the qualification campaign the criteria for the host nations who don't make it.
"There's stuff not agreed, like the final list of stadiums, the qualification issue, that's not all finalised," he acknowledged.
"But we have concepts gone into UEFA and let's see what the feedback is.
"There's a proposal in there. We're open, we'd love to get five, but we're trying to get feedback from them to see how they feel. There's a lot of debate around it."
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