The IRB and the RFU have sent out an update to the refereeing of reckless and accidental tackles
http://laws.worldrugby.org/?domain=9&guideline=10
There has also been an update to the Abuse of the referee
Physical Abuse of a Match Official has remained unchanged as per the previous sanctions table, however a new offence of ‘Incidental Physical Contact with a Match Official’ has been included.
World Rugby recognise that there will, on occasion, be instances of ‘reckless contact with a match official that occurs in a dynamic situation where no injury is caused’ and it was felt that the previous sanctions did not adequately cater for this category of foul play.
Some examples are shown below