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.
