What must cadets do with their vehicles when left unattended?

When cadets leave their vehicles unattended, they must ensure that the vehicles are locked at all times. This is an essential security measure to prevent theft or unauthorized access. Locking the vehicle not only protects personal property inside but also contributes to the overall safety and order within the cadet environment. Ensuring vehicles are secured minimizes risks associated with leaving them unattended, such as vandalism or theft of items inside the car.

Other options would compromise vehicle security. Leaving windows open could allow for weather damage or opportunistic theft. Keeping the keys in the ignition would make it easy for someone to steal the vehicle, and notifying staff about the vehicle's condition, while potentially useful in some contexts, does not directly address the issue of securing the vehicle itself. Therefore, locking the vehicle is the best practice.