My thoughts are that the rule should be for the team, not the driver. And yes, I know what the original rule said, however think about it like this. What if the NAPA team wanted to test but Ron had wasn't available that day? If you put Beckman in the car would you charge that day to the MTS team? I wouldn't.
Robert's team is out of test days, John's team is not. It is John's team that was testing with Robert at the wheel. And I honestly believe that if any other team had asked to test with a different driver they would be told the same thing. The test would be charged to the team, not the driver.
If they weren’t switching cars, say that John had sponsor meetings and Austin wanted to test, would it be a problem to put Robert in the car in that case? Or what if John had driven the car yesterday and then put Robert in it next week? In my mind both of those would be allowed separately, so why wouldn’t they be allowed together?
Once again, I am sharing my opinion; I am NOT speaking for the NHRA
Alan