Steven, I don't think so, but it's possible one of the support folks or aerohive champs who hang out here will know more about this than I.
Out of curiosity, can you elaborate on why this desirable to you? Our thoughts when this was originally developed were that if the backhaul physical link or a critical gateway on the path to The Internet died then shutting down all SSIDs on this device and forcing users to roam was better than leaving them connected to the AP but stranded on an island. It sounds like you are using this feature differently than we originally envisioned.
Thanks for the answer Mike. In my opinion it's not possible. About the idea behind.. In shops we have one SSID for internal use and one for customers with a separate gateway. I was thinking to disable only the SSID for customers when this gateway is unreachable(no SSID is better than one that doesn't work). Because we're testing with mobile payments it can be advisable to bring the SSID down if the gateway is down(so the client can probably fall back on his 4G connection).