Are you sure you have that in the right order? There would have to be an LOA in place before a VB is available to bid. Otherwise I'm sure I'd be fighting to be first in line to grieve the company unilaterally changing my work rules.

Next, solve reserve and short call coverage in a VB. It's beyond ridiculous to think you can take block hours and man power out of an established base to give commuters a special good deal and not have it affect pilot seniority.