A bill for an act relating to county supervisors, concerning county supervisor representation plans and county supervisor vacancies, and including effective date provisions.

HF 127 requires Iowa counties with populations of 125,000+ (based on the latest census) or those containing a state university campus to use "Plan Three" for electing county supervisors. This means these counties must adopt a specific representation map for supervisor elections, with new maps due by October 2025 for the 2026 general election. For supervisor vacancies, the bill mandates special elections in larger counties (125k+ population or university campuses) but allows appointments in smaller counties instead. The bill directly affects county governance structures in qualifying counties, altering both election planning and vacancy procedures.