does one need to carry the ROC(A) along with the aviation document while flying ?
Yes! I revalidated my Canadian Licence at the Edmonton Flying Club in December using my brand new Aviation Document and they pointed out to me that I wouldn't be able to fly solo, because I didn't have my RT licence!
It is now taped in the back of my Aviation Document. I suppose it was too much to expect one government department to co-operate with another when they were planning the Aviation Document!