Sunset or reapprove existing voter approved property tax levies

This bill modifies Montana laws governing voter-approved property tax levies by establishing time limits on their duration and requiring periodic voter reapproval. It directly affects local governments, school districts, and taxing entities that have previously approved property tax increases through elections. The key provision limits most new or extended mill levies to a maximum of 10 years without requiring voters to reapprove them before the expiration date. Additionally, the bill clarifies how tax increment calculations work for targeted economic development districts and urban renewal areas, specifying which mill rates should be excluded from those calculations based on when the districts were created.