The Down GAA board have bucked the recent trend in favour of opening Croke Park by voting against the motion at a meeting last night.
However, the motion was only defeated by the narrowest margin, with 21 votes against and 20 in favour.
Yesterday, Offaly and Kildare followed the vast majority of county boards by voting in favour of the motion.
In 2001, when the last vote was taken at congress, the motion was defeated.
However, the impending temporary closure of Lansdowne Road and the possibility of Irish national soccer and rugby teams playing abroad seems to have motivated most county boards to vote in favour of rescinding Rule 42 and opening Croke Park to non-GAA sports.
Seven of the Ulster counties are now in opposition to Roscommon's and Sligo's motions for change.
All 12 Leinster counties want Croke Park to be opened.
Cork are the only dissenting county in Munster, however, Limerick have yet to decide on their stance.
In Connacht, Mayo and Leitrim have also yet to vote, with the remaming counties in favour of an amendment.
Congress votes on the matter on April 16, with a two-thirds majority needed to pass a motion.
