Pretty simple answer: either test properly, or get rid of the regulation. The university that found the cheating tested properly under real world conditions. The official government testers did not. For that they need to be fired.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The systems passed the specified tests, and thereby met the specs.
I agree with that. VW should be compensated by the government for damage to their reputation.