I see in RB it specifically states that:
CG9. REINFORCEMENTS: ...Units set up off-map that do not enter play that turn are Retained (SSR CG10), but may not longer enter for the remainder of that CG Day.
The closest I can find in the VotG rules is:CG10. RETAINED RG: Each RG, or part thereof, not entering-play/used during a CG scenario is still available for the next CG scenario...
Was this just an oversight or can I assume units set up to enter but do not are still retained in VotG?