Under what condition is a vehicle allowed to not display company markings or logos?

A vehicle is allowed to not display company markings or logos specifically when it is under escort. The primary reason for this is that during escort operations, anonymity can be crucial for security and operational integrity, particularly in sensitive areas like airport airside locations. Vehicles being escorted are typically not operating as independent entities and may be part of a larger process, like transporting oversized loads, which necessitates the absence of identifying markings to prevent confusion or security breaches.

In the context of other options, vehicles transporting hazardous materials generally need to have clear markings for safety and identification purposes. Personal use vehicles also require markings for the sake of accountability and identification within airport grounds. Rental vehicles might sometimes lack company-specific logos; however, they typically must still adhere to regulations regarding marking requirements, particularly within controlled environments like airports.