Very simply put: When the manufacturer declares a production car responsible for the drive (and that declaration is approved by regulators) it will become autonomous within manufacturer’s declared design domain, not a moment before that.
Same for testing: When the manufacturer declares the product in development as autonomous production design intended (and that declaration is approved by regulators), it is considered an autonomous test vehicle within the declared design domain, even if it requires a safety driver.
Otherwise semi-autonomous development, testing and production is not regulated as autonomous (again, as long as approved by regulators — the declarations have to be believable, as Uber learned the hard way, but for Tesla Level 2 production design intents are very believable).
Sure and I guess some of you are arguing they are doing that already, though personally I’m not too sure anything running on HW2/2.5 today bears much if any resemblance to any future autonomous Tesla software.
No, it is not. It is an autonomous driving system once the manufacturer declares it to be. And for testing it is the manufacturer production design intent that makes the distinction.