What must adjustable seats remain in when mounted?

Adjustable seats must remain in a fixed position when mounted to ensure the safety and stability of the occupants during vehicle operation. When seats are mounted, it's critical that they are securely fastened to prevent any movement that could compromise their effectiveness in protecting passengers in the event of an accident. A fixed position provides the necessary structural integrity, preventing any unintended adjustments that could occur while the vehicle is in motion.

While adjustable seats are designed to move to accommodate different driver and passenger preferences, once installed, they should be set in a fixed position that corresponds to the seating configuration approved by safety standards. This ensures that all safety mechanisms, such as seat belts and airbags, function correctly, and that the seat provides adequate support and safety in adherence to regulation.

Other options, like loose or sliding positions, could lead to instability and potential injury, especially during sudden stops or collisions. The detachable option also poses safety risks, as it implies that the seat could be removed or dislodged, further compromising the vehicle's safety features.