194APersons required as witnesses before service tribunals

194A  Persons required as witnesses before service tribunals   Where:  (a) a person (in this section referred to as the prisoner) who is required as a witness before a service tribunal is undergoing a sentence of imprisonment in a State or Territory other than the State or Territory in which the service tribunal is to sit during the period when the prisoner will be so required as a witness; and  (b) the prisoner is produced in the last‑mentioned State or Territory in pursuance of an instrument, issued under the rules of procedure, directed to the person in charge of the prison where the prisoner is undergoing the sentence of imprisonment; then:  (c) the prisoner, while in the last‑mentioned State or Territory in pursuance of the instrument, shall be deemed to be undergoing the sentence of imprisonment; and  (d) the person in whose custody the prisoner is placed has the same powers, in relation to the detention or disposition of the prisoner, as the person to whom the instrument was directed has in the first‑mentioned State or Territory.