What is not required for vehicles operating solely within the restricted area of the airport?

Operating vehicles solely within the restricted area of the airport does not require a valid California license plate because these vehicles are not interacting with standard public roadways where such registration is typically mandated. In restricted zones, specific regulations apply that recognize the unique operational context; hence, vehicles may be exempt from standard licensing requirements that are relevant outside the airport premises.

In contrast, valid insurance coverage, proof of inspection, and special parking permits are typically necessary to ensure safety, compliance with regulations, and proper vehicle management within the sensitive environment of the airport. These elements are crucial for accountability and operational efficiency in restricted areas, where the nature of activities and security concerns dictate stricter control measures.