The possibility of the inter-county season being extended to include an August All-Ireland final from 2027 is set for a critical 72 hours as a number of counties meet to decide whether they will support the motion at this month's Congress.
A recommendation by a working group chaired by former GAA director general Páraic Duffy, essentially a two-week extension to the inter-county season, gained approval to go forward as a motion at a Central Council meeting last September.
It is one of 25 motions to be discussed at Congress, with the GAA meeting with county chairpersons last week to outline them.
RTÉ Sport understands that there remain concerns about the impact on the club season while some counties are also unhappy that pre-season competitions would be effectively retired should the motion pass.
A number of major dual counties, including Cork and Galway, are set to vote against the All-Ireland motion.
Kerry are also set to vote against it in its current guise too unless they can receive guarantees about their club championship window.
Others will hold meetings from Monday to Wednesday to decide which way they will vote with sources in a number of those counties expecting opposition to be the outcome.
Antrim will meet with clubs on Monday to discuss the motion, as will Armagh.
Tipperary will meet on Tuesday to come to a decision on which way to vote, as will Tyrone, with Down delegates discussing the matter on Wednesday. Longford's management and county committees are also set to meet next Wednesday.
Limerick are yet to decide and are considering leaving the call up to their delegates on the day while Leitrim are another county yet to arrive at a stance but do plan to meet next week.
Offaly are set to vote next week while Mayo will also discuss the motion with clubs on Wednesday.
The GAA's Annual Congress will take place on 27-28 February.
Meanwhile the Integration Steering Group (ISG) has earmarked October for special congresses at which the GAA, Camogie Association and Ladies Gaelic Football Association will vote to approve motions related to the new structures required in the new GAA.
There has been some scepticism surrounding the ISG's target date of 2027 for integration to be completed, but at a roadshow at Croke Park on Thursday night, the ISG outlined a process that allowed for further consultation until June, with motions drafted by August and voted upon in October.
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