This regulation specifies requirements for head restraints to reduce the frequency and severity of injuries caused by rearward displacement of the head (i.e. whiplash from rear-end collisions).

A second phase in the development of this rule is underway to address the following:

1. new headrest height requirements;
   
2. a dynamic test to mitigate both short and long term whiplash injuries;
   
3. evaluation of dummy use and injury criteria vis-à-vis biofidelity and correspondence with real world accidents.

GRSP is expected to consider an informal proposal, addressing all issues, including a draft Addendum 1 to the M.R.1 at its December 2016 session. AC.3 agreed to extend the mandate of the IWG until March 2017.

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