Rule 38.5.183 - COMMISSION MAY SEEK SPECIFIC COST DATA(1) If a rate schedule required to be on file with this Commission is not required to be supported by cost of service data as set forth in these rules, but such data may be needed for commission analysis, these rules contemplate that each filing public utility may be required, by letter from the Commission, to submit specified cost data.Sec. 69-3-103, MCA; IMP, Sec. 69-2-101, MCA;