In regards to the question of the back up plane and primary plane, as far as switching back and forth -I WAS WRONG
In reviewing the rules the wording adapted from the Sams rules and implemented into the Nats rules, was left "as is", hence allowing the CD to make the call, as Jeff stated, To allow a primary plane taken out for what ever reason, switching to the back up, and then allowing that original primary plane to be reused.
The wording allows this switching with CD approval.
Sorry for the confusion