Rule 38.5.505 - SUPPORTING MATERIAL(1) Any application for interim authority to increase utility rates sought as part of a general (other-than-tracking) rate increase shall only be deemed filed when all prefiled direct testimony and exhibits supporting the general rate increase request have been submitted.(2) For every interim rate increase request, the applicant shall file the original and eight copies of the letter of transmittal, application exhibits, certificate of service for notice of the interim application and proposed order, with the Commission; two copies of the letter of transmittal, the application and any exhibits shall be simultaneously filed with the Montana Consumer Counsel; copies of the letter of transmittal, application, and any exhibits shall also be filed with all parties to any coincident permanent rate case.(3) Any applications for interim authority to increase utility rates to meet increased costs of a single, clearly measurable expense item (tracking cases) shall be supported by the following:(a) Letter of transmittal(c) Rate schedules - current and proposed(d) Detail of increased expense item(e) Summary of base cost of expense item and proposed adjustment(f) Statements showing effects of proposed adjustment, including operating income, rate of return, and return on average equity.(g) Most recent 12 month balance sheet and income statement.(4) Filings made under this rule and those contemplated by ARM 38.5.507 are not subject to the standards set forth in the Commission's Minimum Rate Case Filing Standards ARM 38.5.101 through 38.5.184.NEW, 1979 MAR p. 324, Eff. 3/30/79; AMD, 1981 MAR p. 384, Eff. 6/12/81.Sec. 69-3-103, MCA; IMP, Sec. 69-3-304, MCA;