The SPFL has initiated disciplinary action against Aberdeen and Celtic for alleged violations of the Covid-19 protocol.
Celtic defender Boli Bolingoli and eight Aberdeen players who broke lockdown rules have also been charged, but by the Scottish FA, for discrediting football and failing to comply with the laws of the game.
Bolingoli played on Sunday although he is not in quarantine after a trip to Spain.
Potential penalties for players range from a two-game ban to eight games.
A hearing date has been set for August 28.
Aberdeen “severely berated and fined” its eight players – Bruce Anderson, Craig Bryson, Sam Cosgrove, Michael Devlin, Jonny Hayes, Matty Kennedy, Dylan McGeouch and Scott McKenna – following an internal investigation.
Two of them tested positive for Covid-19, and the other six were also required to self-isolate, after a visit to a bar in downtown Aberdeen linked to an outbreak of the virus.
Aberdeen has had three Scottish Premiership matches postponed due to non-compliance with guidelines, with Celtic’s two league games this week also called off at the insistence of the Scottish government.
Prime Minister Nicola Sturgeon has warned Scottish football is on its last warning, just two weeks before the new Premiership season.
Under FPSL rules, there is no minimum or maximum penalty that Celtic and Aberdeen could incur if found guilty of violating “Covid-19 requirements and testing regulations.” A three-person panel will review the case on a date that has not yet been confirmed.
The joint intervention group of the SPFL and the Scottish FA is expected to announce a series of sanctions on Friday for players who do not respect the rules of Covid-19.