I'm not aware of any training as part of communications training. PCO, among their responsibilities, may or may not have something like that. I don't know.
In my area, for example, I have responsibility for both parliamentary affairs and communications, and the groups work very closely together. We have the experts there to get advice from, and we do training sessions within our department and appearances at committee, understanding the parliamentary procedures.
System-wide, though, that wouldn't be under the communications policy.