Knightrous, is it the use of a HANS device that has been made mandatory, or is it a requirement for a certified head and neck restraint?
There are a number of different types of devices that do the same things as a HANS, so it seems restrictive to make one particular approach to the problem of these injuries the mandated solution. The analogy here is helmets, the type and brand of helmets is not specified, but be they open face, closed face, lift up, etc. they all have to meet the ASO/ISO rating standard to be accepted for use.
The WIKIPEDIA article referenced states that: "Starting in July 2007, many sanctioning bodies have approved any head-and-neck restraint which passes the SFI Foundation Specification 38.1 standard. They are the HANS, Moto-R Sport, R3, Hutch-II, Hutchens Hybrid, or Hybrid X." I know that the latter are American requirements but where did the information come from about the HANS at LR and QR?
As Dennis said we should all be for safety in these cars and I would certainly support anything that reduced the risk of injury. It's just handy to know exactly what will be required, and under what conditions.
Walter