Kilmarnock could forfeit their postponed Scottish Premiership game against Motherwell after the SPFL charged the Rugby Park club with allegedly breaching Covid-19 protocol.
The 3 October match was called off when an outbreak forced the entire Kilmarnock squad to self-isolate.
After an investigation, the SPFL has opened disciplinary proceedings and the club will "defend our position fully".
An SPFL board sub-committee with an independent chair will hear the case.
Chief executive Neil Doncaster confirmed earlier this month that the board has "broadly unlimited" powers to impose sanctions, including a forfeit, if the club is found guilty.
Celtic and Aberdeen were each fined £30,000 by the SPFL after players from both sides flouted coronavirus protocols earlier in the season.
Eight Aberdeen first-team members visited a bar, where two contracted the virus, causing the postponement of three Premiership matches.
Celtic had two games delayed when full-back Boli Bolingoli went to Spain, did not quarantine on his return, then played against Kilmarnock.
After recording six positive tests in the week leading up to the Motherwell match, Kilmarnock forfeited their opening League Cup group game against Falkirk.
They then had only six senior players back from quarantine for the 3-0 home loss to Dunfermline Athletic in the same competition a week later.