Mont. Code § 85-5-203
The judge may also allow as a charge reasonable expenses incurred by a water commissioner in telephoning to the judge for instructions in cases of emergency. When there are two or more commissioners acting under the judge's order, reasonable expenses incurred in communicating with each by telephone or with the judge of the district court, in order to carry on the distribution of the waters harmoniously and in accordance with the decree, shall be deemed a necessary expense. These expenses shall be reported by the water commissioner or commissioners at the close of the season and shall be taxed against all the water users affected by the decree or decrees ratably in proportion to the whole amount of water distributed to them during the season.
§ 85-5-203, MCA