The report on Northampton’s handling of George North’s latest head injury will be published on Wednesday.
A concussion panel was set up after the winger, 24, played on after landing on his head in the loss to Leicester.
The three-man panel has investigated the circumstances and will decide if Saints have any case to answer.
The final version of the report will be delivered by the Concussion Management Review Group late on Tuesday, prior to its full publication on Wednesday.
The panel comprises the Rugby Football Union’s director of professional rugby Nigel Melville, Phil Winstanley of Premiership Rugby, and independent chairman Dr Julian Morris.
TV replays appeared to show the Lions star lying motionless after a tackle by Leicester’s Adam Thompstone in the game on 3 December, but he returned to play after passing a pitch-side assessment.
The Wales winger previously had a six-month spell out of the game after suffering a series of blows to the head during matches, including a serious concussion when scoring a try against Wasps in March 2015.
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