Does anyone know if there is a rule or state law forbidding Ts to have contact with clients after termination, or do Ts make up their own rules about this? Why would a T say it's all right to write or email, but say they are not "allowed" to respond?

None of my former Ts forbade me to contact them, though my first one told me she wouldn't reply, and she never did. The others either answered my letter (this was before email), or emailed me back. They accepted phone calls from me, also. It was only occasional contact in each case.

I also wonder about the rule that a T is only "allowed" to greet a client if the client speaks first. One of my former Ts told me about that, but she said "hi" to me in the grocery store once, before I did, because I didn't see her!