Yes, I was thinking of national professional organizations like the APA. The APA is for psychologists. There are other similar professional orgs for therapists and counselors. If you do some sleuthing, you can find them. I can't remember their names or else I'd list them. The only one I can recall was for Family and Marriage Therapists--the American Association of Marriage and Family Therapists. I think I checked the guidelines of about 6-7 different organizations, including the APA. It was interesting how much they varied. A starting point might be the profession of your T. At the state level, my state provides guidance for lower level professionals (sub-therapist) and the guidance is that no subsequent relationship is allowed. At higher levels, such as therapist, there is no strict guidance like that, so I assume they let the professional go by the ethical guidelines of their profession, such as APA, AAMFT, etc. Perhaps other states might offer more guidance.