James1951:
I was answering the general question in general.
I recently completed Salvage radiation together w/ 4 mos ADT; as recommended by my Rad Onc at Johns Hopkins.
My understanding is that for BCR: Moderate risk cancer recommendation is Radiation and 4 - 6 mos of ADT.
High risk cancer recommendation from a recent authoritative study is Radiation and 18 - 24 mos ADT.
My cancer was G 9, which would be high risk, however my ADT recommendation was 4 mos (did not have decipher analysis).
Listened to, and trusting, my Rad Onc.
Lower risk cancer recommendation may be Radiation only.
As others have noted, there are a number of schools of thought, and many different recommendations.
Best to all to manage these challenging decisions.