Montana Title 7. Local Government § 7-7-4629. Management of enterprise

(a) operate the enterprise in an efficient and economical manner and establish, levy, maintain, and collect fees, tolls, rentals, rates, and other charges in connection with the enterprise as may be necessary or proper, in an amount that is sufficient, after making due and reasonable allowances for contingencies and for a margin of error in the estimates:

(b) operate, maintain, preserve, and keep or cause to be operated, maintained, preserved, and kept the enterprise and every part of the enterprise in good repair, working order, and condition;

(c) pay and discharge or cause to be paid or discharged any lawful claims for labor, materials, and supplies that, if unpaid, might by law become a lien or charge upon the revenue prior or superior to the lien of the refunding bonds or that might impair the security of the refunding bonds, to the end that the priority and security of the refunding bonds are fully preserved and protected;

(d) keep proper books of record and accounts of the enterprise, separate from all other records and accounts, in which complete and correct entries must be made of all transactions relating to the enterprise and that, together with all other books and papers of the municipality, must at all times be subject to the inspection of the holders of not less than 10% of the refunding bonds then outstanding or the holders' representatives authorized in writing.