Rule 38.5.129 - PROPERTY RECORDS WORKING PAPERS(1) Working papers shall set forth a description of the continuing property records maintained by the utility, including methods and procedures used to price retirements. Any data required by this section which has been previously submitted to the Commission by the utility, pursuant to these rules, may be incorporated by specific reference.Sec. 69-3-103, MCA; IMP, Sec. 69-2-101, MCA;