Rules came in place June 2011 to prevent such incidents as the 2008 one.
India have been fined for this occurring twice within one year.
Dhoni would be aware that he has already been warned and, should therefore face the ban.
2 overs slow doesn't matter, he should've realised the over rate was slow and put in a part timer to speed it up or had a word with the quicks.
Posted on Monday, 16th January 2012