It was a joke because I explained that one awhile ago.

Pay/credit recovery from vacation bank?

I think this is where we discussed it. Vacation bank time can cover APD, PD, IVD. Then you can use full service bank time over a vacation month. The result is an extra vacation period using full service bank hours over any APD, PD, IVD. You don’t lose credit for a GS month and you get a week of your choice.