There is not a clear legal path because no one at the Fed level ever felt it was necessary. Until recently, they were always sold as either scrap, or with paperwork for titles. They are just trucks, and
were sold as such.
As a casual observer, I see that these regulations follow pretty much what is expected in the E.U. (Not including a FULL Vehicle test/inspection Every 12 months(And, the driver to have a drivers license in type)).
AS read, this recommendation appears to apply to "Offroad" (designated at point of disposal) Sale. / Release.
By coincidence, It also seems to follow closely, and apply to (be in line with) 'Comments made by steelsoldiers members' ) about /*drivers* AND *incidents (some severe). Who, erred caused or ignored the rules of safety legal requirements and operation.
It (the regulation).( As an observer) ,seems NOT to apply to current correctly registered designated and operated ) Historic ex military vehicles.
Please remember, this is just my own opinion, having read and followed the very many posts that could involve and or effect the furtherance of the hobby.