The party requesting a subpoena shall pay the cost of the fee and mileage of any witness subpoenaed in the amounts that would
be payable to a witness in a proceeding in the United States District Court. A check for witness fees and mileage shall
accompany the subpoena when served, except that when a subpoena is issued on behalf of USIA, a check for witness fees and
mileage need not accompany the subpoena.