Revise rural improvement district laws to include maintenance of existing public improvements

This bill updates Montana's rural improvement district laws to allow these districts to be created specifically for maintaining existing public improvements like roads. It changes how districts are formed by removing the requirement for a formal petition when all property owners in the area waive their right to protest, and it lowers the consent threshold for road maintenance districts to either 85% of property area or 50% if all roads are already public. The legislation also clarifies how rural improvement districts can include properties inside city limits and streamlines the process for combining different types of improvements in a single district. These changes affect rural property owners, county commissioners, and local governments by making it easier to establish and manage districts for infrastructure maintenance.