What condition would cause a seat belt to be rejected during inspection?

A seat belt that is frayed, split, or torn presents a significant safety hazard and is a valid reason for rejection during an inspection. The integrity of a seat belt is crucial in providing effective restraint during a collision. Any damage that compromises its structure can reduce its effectiveness, increasing the risk of injury to the occupants in an accident.

While broken stitching, incorrect installation, and excessive length could also be concerns, they do not directly indicate a compromised safety function as strongly as visible fraying, splitting, or tearing. Fraying, for instance, could occur due to wear and tear over time, directly impacting the seat belt's ability to safely restrain a passenger. Thus, this condition is prioritized in the inspection process to ensure the utmost safety for vehicle occupants.