At a quick glance, (that"s all it deserves) I saw that "tickover" is included in the tests!
As there probably is" nothing in the rules" to prevent the use of Stop/ Start at the tickover stage provided that it was automatically initiated, that was the basis on which it was "invented", and therefore used within the test cycle at the" tickover stage." VW and others got up to multiple tricks, are we to assume that everyone else is squeeky clean. ok , one manufacturer did it first and they are all doing it now!
Do you really believe that All the manufacturers went to the expense and complication to add this to their cars if it in no way was allowed to improve economy and emissions figures for the test? and that they turn it off during testing? but fit it simply for the after test times. Also why it is not a delete option and initiates each and every time we start the car. Presumably if we could delete it then it would not be allowed.
Remember:
It requires a better Battery,more durable Starter motor (hopefully) and all the electrical complication to also monitor temperature, gear position, brake/clutch A/C etc, granted some of this is already in the system, but all for no gain, just out of their concern for the planet.