The right to obtain witnesses under AS 12.50.010 - 12.50.080 in criminal proceedings shall extend to the state or a defendant. Witness fees shall be paid by the party calling the witness, except as provided in Rule 17(b), Alaska Rules of Criminal Procedure. If the time estimate in the certificate of the requesting court is exceeded, the nonindigent defendant shall be required to tender additional per diem or post bond to insure payment of total witness fees.