This Subdivision applies to a subpoena that:
(a) has been issued by a tribunal in connection with the performance of an investigative function by the tribunal; and
(b) is addressed to a person (in this Subdivision called the prisoner ) who is in prison in a State other than the place of issue and who is required to:
(i) attend before the tribunal for the purpose of complying with the subpoena; or
(ii) give oral evidence, by audio link or audiovisual link, to the tribunal.