Default WorldGuard flags?

I’m setting up a server and I’m having some “issues” with WorldGuard. We’re using latest WorldEdit and WorldGuard on our Minecraft servers.

Our goal: the player can create a region, but not edit their own flags. The flags should be set up by what I declare in the config and that’s it, no changes after that.

Permissions are set up properly and I know which ones I need to grant and revoke, so that’s not my question. In the config of worldguard, it shows all the flags possible. These apply to the __global__ region (correct me if i’m wrong), which is not what I want on my Minecraft server.

Is there a way to set up default values for newly created regions? How would third-party plugins handle those default values?