House Bill 571 revises aeronautics laws in Montana concerning the use of Automatic Dependent Surveillance-Broadcast (ADS-B) systems. The bill prohibits any entity, including government divisions and private companies, from using information obtained from ADS-B systems to calculate, generate, or collect fees from aircraft owners or operators within the state. This restriction specifically applies to aircraft defined as having a gross weight of 9,000 pounds or less and operating under Title 14, part 91 of the Code of Federal Regulations.

Additionally, the bill provides definitions for key terms related to the legislation. It clarifies that "aircraft" refers to those meeting the specified weight and operational criteria, while "automatic dependent surveillance-broadcast" describes the technology that enables accurate surveillance between aircraft and air traffic control through the use of positioning data and other information. The provisions of this bill are intended to be codified as part of Title 67, chapter 1, part 1 of Montana law.