We have a Plan that is only visible in the back-end and would like to make it available as an upgrade otpion only when a subscriber's previous subscription is no longer/not active.

I have tried using 'Static Conditions on already existing subscriptions and CB Fields and Dates to allow upgrades' but it seems that these are applicable only to the front-end - all published Plans are always displayed in the back-end.

Is there a way to enforce the restricted availability of a Plan in the back-end in this way?

Thank you