http://www.nasaproracing.com/rules/ccr.pdf
The 2007 CCR is posted. Not too many changes. A head and neck restraint is not yet mandated, but, by July 1, you must have side impact protection via a seat with large head-height side bolsters or a right side net with quick release.
Also, cars getting logbooks after Jan 1 have to have at least two door bars, and all cars must have them by 2011 (whoa, way to push the safety envelop there, NASA)
There are some clarifications on behavior when a double-yellow is displayed and taken down.
On the instructing-at-HPDEs front, I was disappointed that they clarified that a car does NOT need comparable restraints for the instructor as well as the driver (i.e. driver can have a harness and instructor left with stock belts). However, my Reg Dir and Chief Instructor has stated that he will back any instructor that doesn’t want to ride in a car like that.
cheers,
bruce