Which air traffic facility has NO direct authority over IFR or VFR traffic?

The Flight Service Station (FSS) does not have direct authority over IFR (Instrument Flight Rules) or VFR (Visual Flight Rules) traffic. FSS primarily provides services like weather briefings, flight planning assistance, and information dissemination to pilots. While they play a critical role in supporting flight operations, they do not have control over aircraft movement or the authority to issue air traffic clearances. Instead, control of IFR and VFR traffic falls under the purview of other facilities such as control towers, Terminal Radar Approach Control, and clearance delivery, which have the responsibility for the safe and orderly flow of air traffic. The information provided by FSS is essential for pilot decision-making, but it does not equate to regulatory control over traffic management.