The word "state" shall include any territory of the United States, and the District of Columbia.
The word "summons" shall include a subpoena, order or other notice requiring the appearance of a witness.
If at a hearing the judge determines that the witness is material and necessary, that it will not cause undue hardship to the witness to be compelled to attend and testify in the prosecution or a grand jury investigation in the other state, and that the laws of the state in which the prosecution is pending, or grand jury investigation has commenced or is about to commence (and of any other state through which the witness may be required to pass by ordinary course of travel), will give to him protection from arrest and the service of civil and criminal process, he shall issue a summons, with a copy of the certificate attached, directing the witness to attend and testify in the court where the prosecution is pending, or where a grand jury investigation has commenced or is about to commence at a time and place specified in the summons. In any such hearing the certificate shall be prima facie evidence of all the facts stated therein.
If said certificate recommends that the witness be taken into immediate custody and delivered to any officer of the requesting state to assure his attendance in the requesting state, such judge may, in lieu of notification of the hearing, direct that such witness be forthwith brought before him for said hearing; and the judge at the hearing being satisfied of the desirability of such custody and delivery, for which determination the certificate shall be prima facie proof of such desirability may, in lieu of issuing subpoena or summons, order that said witness be forthwith taken into custody and delivered to an officer of the requesting state.
If the witness, who is summoned as above provided, after being paid or tendered by some properly authorized person the sum of ten cents a mile for each mile by the ordinary traveled route to and from the court where the prosecution is pending and five dollars for each day, that he is required to travel and attend as a witness, fails without good cause to attend and testify as directed in the summons, he shall be punished in the manner provided for the punishment of any witness who disobeys a summons issued from a court of record in this state.
If the witness is summoned to attend and testify in this state he shall be tendered the sum of ten cents a mile for each mile by the ordinary travel route to and from the court where the prosecution is pending, and five dollars for each day that he is required to travel and attend as a witness. A witness who has appeared in accordance with the provisions of the summons shall not be required to remain within this state a longer period of time than the period mentioned in the certificate, unless otherwise ordered by the court. If such witness, after coming into this state, fails without good cause to attend and testify as directed in the summons, he shall be punished in the manner provided for in the punishment of any witness who disobeys a summons issued from a court of record in this state.
If a person passes through this state while going to another state in obedience to a summons to attend and testify in that state or while returning therefrom, he shall not while so passing through this state be subject to arrest or the service of process, civil or criminal, in connection with matters which arose before his entrance into this state under the summons.