Mont. Code Ann. tit. 25, ch. 24, Rule 4
Docket and index
Rule 4 . Docket and index.
(a) The court shall assign each citation and complaint a docket or case number. All docket or case numbers shall be in numerical order.
(b) The court shall maintain an alphabetical index to the docket as provided under Section 3-10-503 , MCA.