The properties of each of the parties that the same is at least communication must have been known to talk to other people and other property might not be the same, especially the Department guides.
Property of each party to the communication is a must at least have been known to talk with others. And other properties may not be the same. The department guides
The properties of each side is the same communication must at least have been known to talk with others. And other features may be different, especially the guide.