Vehicles containing explosive materials must be:

Vehicles containing explosive materials must be attended at all times when parked to ensure safety and security. This requirement arises because explosives are highly dangerous and can pose a significant risk to public safety if they are mishandled or tampered with. By having a trained and authorized individual present, there is an immediate response capability to address any potential hazards, such as leaks, unauthorized access, or unexpected reactions.

In addition to being attended, the storage and handling of explosive materials often come with specific regulations and guidelines that dictate their security measures to prevent accidents and ensure compliance with safety standards. Having personnel present can also help in monitoring for environmental factors that could affect the stability of the explosives.

The other options do not sufficiently address the critical safety concerns associated with explosive materials. For instance, pushing a vehicle into a garage may not provide the level of safety and oversight necessary. Parking in a designated area without attendance might still leave the explosives vulnerable to theft or accidental initiation. Leaving them unattended for safety could lead to disastrous consequences, as it negates the essential safeguarding that constant supervision provides.