The URC release stated:
After an act of foul play by Ulster Rugby player No 4 (Harry Sheridan), referee Federico Vedovelli showed the Player a Red Card in the 45th minute of the game under Law 9.13 – A Player must not tackle an opponent early, late or dangerously. Dangerous tackling includes, but is not limited to, tackling or attempting to tackle an opponent above the line of the shoulders even if the tackle starts below the line of the shoulders
In the Player’s responses to the Judicial Officer overseeing the disciplinary process (Ms. Rhian Williams), he had accepted that he had committed an act of foul play which warranted a Red Card. Ms. Williams found that the incident met the Red Card threshold, with entry of mid-range warranting six weeks. The Player received 3 weeks (50%) mitigation due to his exemplary record, immediate remorse & acceptance of the Red Card which results in a three game suspension.
Should the Player complete the World Rugby Coaching Intervention Programme then the sanction will be reduced by one week.