I have not heard that anywhere Jess.... There is no way that co-sleeping couldnt be allowed!! People have a right to sleep next to their own children!!!
On the Sids and Kids website, it does say that co-sleeping is not recommended, but they do give a list of safe guidelines for people that do choose to co-sleep.
I honestly believe that no-one has the right to tell any parent that they are not allowed to co-sleep, unless maybe it was being done unsafely?