Where Do I Find The Rules For The Presidential Debates? Do They Mention Use Of Electronic Devices?

I am trying to find the specific rules for the Presidential Debates. It appeared to me that Sara Palin was looking down at a Blackberry type device last night, based upon her body language and facial expressions. I am trying to determine if there was a rule in place prohibiting the use of electronic devices. Barak Obama appeared to do the same thing to me in the 1st Presidential debate. Thanks in advance.