Minn. R. Adop. P. 13.07
Subd. 1. Witnesses. If the subpoena is issued at the request of the State of Minnesota, a political subdivision of the State, or an officer or agency of the State, witness fees and mileage shall be paid by public funds. If the subpoena is issued at the request of a party who is unable to pay witness fees and mileage, these costs shall upon order of the court be paid in whole or in part at public expense, depending upon the ability of the party to pay. All other fees and mileage shall be paid by the requesting party, unless otherwise ordered by the court upon motion.
Subd. 2. Expenses of Experts. Subject to the provisions of Rule 17, a witness who is not a party to the action or an employee of a party and who is required to give testimony or produce documents relating to a profession, business, or trade, or relating to knowledge, information, or facts obtained as a result of activities in such profession, business, or trade, is entitled to reasonable compensation for the time and expense involved in preparing for and giving such testimony or producing such documents. The party serving the subpoena shall make arrangements for such reasonable compensation prior to the time of the taking of the testimony. If such arrangements are not made, the person subpoenaed may proceed pursuant to Rule 13.04 or Rule 13.05. If the deponent has moved to quash or otherwise objected to the subpoena, the party serving the subpoena may, upon notice and motion to the deponent and all parties, move for an order directing the amount of such compensation at any time before the taking of the deposition.
Minn. R. Adop. P. 13.07