Minimum time controls for CLANS

I would like to be able to specify that my clan won't be accepting challeges < 7 days timeout.
Anyone sending 3/7 for example could receive an automatic message rejecting the challenge (as for individual challenges).
It's a fag declining all the 3/7s, and I don't have time to pm the relevant clan leaders to explain.

This is possible for individual players with the challenge settings, so I don't see why this should not be available to a group of individuals. Then I would like to see a max. clan challenge average rating difference setting. And of course a maximum number of games not only for a clan, but for individual players in that clan too.