MI HB4727

Requires the Michigan Aeronautics Commission to conduct airspace studies before issuing permits for structures over 500 feet tall or structures that could interfere with aircraft navigation, approach surfaces, or runway operations.

Establishes new regulations for meteorological towers 50 feet or higher, requiring them to be painted in alternating orange and white bands, equipped with 7-foot safety sleeves at anchor points, and marked with orange marker balls on guy wires.

Mandates existing meteorological tower owners to register their towers with the commission within 60 days of the law's effective date, providing GPS coordinates, elevation, height, and contact information.

Requires meteorological tower owners to mark their structures within 1 year of the effective date and to notify the commission within 10 days of tower removal.

Clarifies that new meteorological towers must be registered with the commission at least 10 days before erection, and specifies that structures over 800 feet tall must use high-intensity white obstruction lights operational during daylight hours.