Section 2209 refers to a provision of the FAA Extension, Safety, and Security Act of 2016 that set up a process for certain facilities to request airspace restrictions around their location because of the security or safety risk that unauthorized drone flights could pose. It's frequently referenced by airports, critical infrastructure operators, and correctional facilities trying to understand what tools exist to manage drone risk near their site.
What the process generally allows
Under this framework, eligible facilities — a category that has included certain airports, critical infrastructure sites, and other sensitive locations identified by the FAA — can submit a request asking the agency to designate airspace restrictions for drone flights in the vicinity. If the FAA grants a request, the resulting restriction is typically published so operators and detection systems can be aware of it, similar to other categories of restricted or special-use airspace.
Being eligible to request a restriction doesn't guarantee the FAA will grant it, and the process involves the facility making its case through the appropriate FAA channels rather than restricting airspace unilaterally.
What it doesn't do
A Section 2209 restriction changes the rules for where drones may legally fly — it does not, by itself, detect drones, notify anyone when a drone violates the restriction, or take any action against a non-compliant aircraft. Facilities that pursue a restriction typically still need a way to know whether the restriction is actually being respected, which is where detection technology and internal procedures come in.