SENT Spawning Question

I am running a DarkRP server with ULX, and I have it set so only superadmins can spawn weapons. I would also like to make it so that only superadmins can spawn SENTS (entities). Is there a way to do this?
Thanks guys

You can use URS if you like.

https://dl.dropbox.com/u/7934790/gmod/urs.zip