Thank you, as always, for the important info. But this is a problem, as the new check system isn't as quick to judge as the old one (a complete review can take days), and I often realized very late that a site of mine had been excluded from the official listing, or had been totally blocked.

However, based on the info you provide, it should be possible to check if the site is on the listing, and if it's not (for whatever reason, including automatic check, manual ban list and ban word list) the switch should reflect that. If checking the official listing it too heavy on the server, maybe creating a JSON or XML snapshot updated every few hours would be better than nothing anyway.