On which components should the center of balance marking also be present?

The correct answer emphasizes that the center of balance marking should be present on all vehicles or rolling stock. This is crucial for ensuring the safe loading and unloading of transportation assets. Vehicles and rolling stock have specific handling protocols due to their structure and dimensions, and marking the center of balance helps operators accurately position these assets during transport to prevent tipping, damage, or injury.

The presence of center of balance markings assists personnel in identifying the appropriate lifting and securing points, particularly when using equipment such as forklifts or cranes. This contributes to operational efficiency and safety by providing clear guidance on how to handle these items.

In contrast, while the other options pertain to specific types of cargo handling, they do not encompass the broader requirement for vehicles or rolling stock. For instance, cargo and specialized containers may have their own considerations for center of balance, but vehicles represent a different category of transport assets requiring their own specific handling protocols and markings for operational safety.