Allowing mods to give other mods infractions/warnings

[scapescene]

First of all, sorry if this is in the wrong section.

This might just be me being stupid (I'm blonde, so this happens a lot) but i'm having trouble with my forum.
Ok, I have VIP members who have their own subforum - for which, they are a moderator. The problem is, when my moderators want to warn them/give an infraction, a message saying something similar to "you cannot give a warning to a moderator"
So how would i change the permissions so that mods can give infractions?

Someone told me to check the "can be given infractions" button in the VIP usergroup - but I don't see this anywhere.

I posted this in the "how do i" on the VB community site, they referred me here.
BTW, I have VB 3.6.4

Thanks in advance for the help