Montana Title 7. Local Government § 7-13-4307. Establishment of amount of charges

(1) payment of the reasonable expense of operation and maintenance;

(2) payment of the sums required to be paid into the sinking fund;

(3) accumulation of reserves;

(4) payment of rates, fees, and charges levied by a regional authority established pursuant to Title 75, chapter 6, part 3; and

(5) payment of expenditures for depreciation and replacement of the system as determined necessary by the governing body or as covenanted in the ordinances and resolutions authorizing the outstanding bonds.