Here is my "Relentless Rats" EDH / Commander deck http://www.mtgvault.com/ViewDeck.aspx?DeckID=280761
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Here is the ruling: http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=205082
Read the subtext under Relentless Rats "A Deck can have any number of Relentless Rats". This over rules the EDH rule.
The only reason it is in the because I need to get a few more Relentless Rats but they are hard to find. Since they are the same casting cost. Thanks for the feedback.