HOD, PCA and others are going to require a HNR for all 4-7 point harnesses unless you're using the Schroth ASM. This goes into effect on January 1, 2019. I suspect a Hybrid device will be required within the next couple of years for use with a factory 3 point harness. We were required to wear a Simpson Hybrid HNR at the GT350 Track Tour three years ago. We've been discussing HNR's in the thread below. https://trackmustangsonline.com/threads/hans-device-vs-simpson-hybrid.14268/ Thoughts on this?