What does a vehicle's locking jaws need to pass inspection?

For a vehicle's locking jaws to pass inspection, they must be in the locked position while displaying proper alignment and functionality. The requirement for "PMS, not BBC" refers to the standards that ensure the locking mechanism is secure and correctly positioned. The acronym PMS indicates that the locking jaws must meet specific performance and maintenance standards to safely hold the fifth wheel and trailer in place during operation.

This is crucial for preventing accidents and ensuring the safety of the vehicle's operation. Other options do not meet the standards for safety and functionality. For instance, having loose locking jaws, visible wear, or rust could compromise the performance and safety of the towing mechanism, making them inappropriate for passing inspection. Therefore, the focus on the locking jaws being in proper condition while securely locked is what validates option A as the correct choice.