A few assertions... (please correct if wrong) followed by a question.

Assertion 1: If a GCV is declared at the Driver SET, and NOT declared on an
individual driver, then the value on the driver set is available for use in
policy of any driver in the set.

Assertion 2: If a Driver GCV of the same name as a Driver-SET GCV is given
a value, the value of the GCV on the DRIVER will take precedence.

Question: If a GCV of the same name is declared in both the Driver and the
Driver Set, but the Driver value is left at null, will the Driver-Set GCV
value pass through, or does the declaration of the GCV on the Driver
immediately over-ride anything set in the Driver-Set GCV?