Shamrock Rovers face the prospect of playing their opening SSE Airtricity League Premier Division game of the new season behind closed doors due to the incident where fireworks exploded on the pitch against Waterford FC last campaign.
Fireworks exploded both over the pitch and in the away supporter's section during the clash at the RSC on 5 November.
One man was injured in the incident and was taken to Waterford Regional Hospital to receive treatment.
Shamrock Rovers "unequivocally condemned" the action of the "so-called supporters" at the time and said they would be issuing indefinite bans from Tallaght Stadium to the people involved.
The game between Shamrock Rovers and Waterford was temporarily delayed as fireworks detonated above the pitch. pic.twitter.com/OyXj0blaNF— RTÉ Soccer (@RTEsoccer) November 5, 2021
It had been anticipated the Dublin side would be hit with a large fine for the incident.
The FAI punishment has been stronger than expected, however, with a ruling this week that the Hoops cannot welcome fans for the first match of the defence of the league title against UCD.
The move could cost Shamrock Rovers tens of thousands of euro on lost gate receipts with a crowd of at least 6,000 supporters likely for the fixture.
The FAI or the Hoops have yet to comment publicly on the decision.