Each Of these seat belt parts is designed to work in conjunction, ensuring optimal protection during travel. This restraint must only be used on school bus seats. Entire seat directly behind must be unoccupied or have restrained occupants.” (The instruction's reference to a “restrained occupant” refers to an occupant restrained https://www.webwiki.ch/www.ledteks.com/seatbelt-and-safety-belt-webbing