Yes, I agree, they may be shackled only in those circumstances, that is what I said. They are not shackled in any other circumstances such as in the normal course of daily prison life, that is also what I said.
You commented that it was "BS" to my comment that "no one wears ankle chains inside Thai prisons unless they are being punished for in-jail misbehaviour". My comment was accurate, your "BS" remark was not.