(a) Definitions. The following words, when used in this section, have the meaning specified, unless the context otherwise indicates: “Witness” means a person whose testimony is desired in any proceeding or investigation by a grand jury or in a criminal action, prosecution or proceeding; “state” includes any territory of the United States and the District of Columbia, and “summons” means a subpoena, order or other notice requiring the appearance of a witness.

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(b) Summoning witness in this state to testify in another state. If a judge of a court of record in any state which by its laws has made provision for commanding persons within that state to attend and testify in this state certifies, under the seal of such court, that there is a criminal prosecution pending in such court, or that a grand jury investigation has commenced or is about to commence, that a person being within this state is a material witness in such prosecution or grand jury investigation and that the presence of such witness will be required for a specified number of days, upon presentation of such certificate to any judge of a court of record in the judicial district in which such person is, such judge shall fix a time and place for a hearing and shall make an order directing the witness to appear at such time and place for such hearing. If, at such 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 such other state and the laws of any other state through which the witness may be required to pass by ordinary course of travel will give to such witness protection from arrest and from the service of civil or criminal process, the judge 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, except that no judge shall issue a summons in a case where prosecution is pending, or where a grand jury investigation has commenced or is about to commence for a criminal violation of a law of such other state involving the provision or receipt of or assistance with reproductive health care services or gender-affirming health care services, as defined in section 52-571n, that are legal in this state, unless the acts forming the basis of the prosecution or investigation would also constitute an offense in this state. At any such hearing, the certificate shall be prima facie evidence of all the facts stated therein. If such certificate recommends that the witness be taken into immediate custody and delivered to an officer of the requesting state to assure the attendance of the witness in such state, such judge may, in lieu of notification of the hearing, direct that such witness be forthwith brought before such judge for such hearing, and, being satisfied, at such hearing, of the desirability of such custody and delivery, of which desirability such certificate shall be prima facie proof, may, in lieu of issuing a subpoena or summons, order that such witness be forthwith taken into custody and delivered to an officer of the requesting state. If such witness, after being paid or tendered by an authorized person the same amount per mile as provided for state employees pursuant to section 5-141c for each mile by the ordinary traveled route to and from the court where the prosecution is pending and five dollars each day that such witness is required to travel and attend as a witness, fails, without good cause, to attend and testify as directed in the summons, the witness 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.

(c) Witness from another state summoned to testify in this state. If a person in any state, which by its laws has made provision for commanding persons within its borders to attend and testify in criminal prosecutions or in grand jury investigations commenced or about to commence in this state, is a material witness in a prosecution pending in a court of record in this state, or in a grand jury investigation which has commenced or is about to commence, a judge of such court may issue a certificate under the seal of the court, stating such facts and specifying the number of days the witness will be required. Such certificate may include a recommendation that the witness be taken into immediate custody and delivered to an officer of this state to assure the attendance of the witness in this state. Such certificate shall be presented to a judge of a court of record in the judicial district in which the witness is found. If the witness is summoned to attend and testify in this state, the witness shall be tendered the same amount per mile as provided for state employees pursuant to section 5-141c 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 such witness 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, the witness 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.

(d) Exemption from arrest and service of process. If a person comes into this state in obedience to a summons directing him to attend and testify in this state, he shall not, while in this state pursuant to such summons, 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 such summons. 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 such summons.

(e) Interpretation. This section shall be so interpreted and construed as to effectuate its general purpose to make uniform the laws of the states which enact it.