He was charged with a breach of Level 2 of the Code of Conduct but match referee David Boon felt that a Level 1 breach was appropriate, relating to 'conduct contrary to the spirit of the game'.
As such he has been given the maximum penalty for a Level 1 breach, and the decision is non-appealable.
The incident occurred as the players left the field for lunch on day two of the first Test at Trent Bridge, and subsequently Jadeja was charged with a Level 2 breach by the England team management and Anderson charged with a Level 3 breach by the Indian team management.
Anderson faces a disciplinary hearing on 1st August, which will be heard by Judicial Commissionner His Honour Gordon Lewis AM.
Boon held Jadeja's hearing in Southampton, which lasted 150 minutes and included oral statements by the players, analysis of video footage and cross examination of the witnesses by both ECB and BCCI representatives.
Under article 7.6.5 of the ICC Code of Conduct, Boon was empowered to find Jadeja guilty of an offence at a lower level to the one he was charged with if found not guilty of the original offence.
Explaining his decision, Boon said: "Under Article 6.1 of the Code, I had to be comfortably satisfied that the offence had occurred in order to find Mr Jadeja guilty of an offence under Article 2.2.11.
"While I was in no doubt that confrontation did occur, and that such conduct was not in the spirit of the game and should not have taken place, I was not comfortably satisfied that this was a level 2 offence.
"Therefore, in exercising my discretion under Article 7.6.5 of the Code and having heard all the evidence, I was comfortably satisfied that Mr Jadeja had committed a level 1 offence under Article 2.1.8 of the Code."
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