John,
The most ancient canons are the "Apostolic Canons", and they are probably 1st century. But many of the later canons are from the oral Tradition referred to by St. Basil the Great. To be honest with you, I do not know the answer to your question because I am just not a canonist. But there certainly do seem to be some good clues on all this in the New Testament, clues that indicate to me at least that the so-called "lesser clergy " (deacons & priests), were normally married.
You really are asking the wrong guy. Ask Agrarian or kosta50. See what they think.