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Bill

HB 571

Revise aeronautics laws related to the use of ADS–B information

2025 Regular Session Introduced by Shane Klakken

Montana law now regulates state access to real-time aircraft tracking data (ADS-B) to protect privacy while preserving aviation safety and law enforcement capabilities.

Chapter Number Assigned
#transportation
0
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Bill Summary · HB 571

Legislative bill overview

HB 571 revises Montana's aeronautics laws to regulate how Automatic Dependent Surveillance-Broadcast (ADS-B) information—real-time aircraft location and identification data—can be used by state agencies and private entities. The bill establishes guidelines for accessing, sharing, and protecting this aviation surveillance data that was previously unregulated at the state level.

Why is this important

ADS-B data is collected by ground receivers and contains sensitive information about aircraft movements, including private flights. As this technology becomes more prevalent and accessible through affordable receivers, establishing clear legal boundaries prevents unauthorized tracking of individuals while balancing legitimate aviation safety and law enforcement needs. The bill addresses a growing gap between federal FAA regulations and state-level privacy protections.

Potential points of contention

  • Privacy vs. public safety: Restricting ADS-B access could limit law enforcement's ability to track suspicious aircraft, while unrestricted use enables warrantless surveillance of private flights
  • Commercial data use: Unclear whether commercial entities (data brokers, insurance companies) can purchase and resell aircraft tracking information for profit
  • Enforcement mechanisms: The bill may lack sufficient penalties or oversight structures to ensure compliance with access restrictions

Compiled from official sources — confirm details with the bill’s official record.

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