N.D. Cent. Code § 44-09-27: Impeachment trial - Compensation of officers and witnesses - Payment

The same fees must be allowed to witnesses, officers, and other persons serving process or orders as are allowed for like services in criminal actions, but no fees can be demanded in advance. Such fees must be certified and paid as provided in section 44-09-26 for the payment of the senate officers, clerks, reporters, and counsel but subject to the right of the senate to disallow all fees and charges which it shall deem unreasonable or unnecessary.