NFPA® 1901, Standard for Automotive Fire Apparatus, requires a placard in every apparatus, listing:

The correct answer is the requirement for a placard to list the vehicle height and weight in feet and tons. NFPA® 1901 emphasizes safety and operational standards for automotive fire apparatus, including the specifications that should be clearly displayed for the safety of both the apparatus operators and the public.

Having the vehicle height and weight clearly indicated helps ensure that firefighters and emergency responders can make informed decisions regarding the apparatus's operational capabilities and constraints. For example, knowing the height is critical when navigating areas with low overhead clearances, such as bridges or tunnels, and weight specifications are crucial for understanding load capacity and ensuring the vehicle operates within safe limits.

Additionally, having this information readily available can also assist in planning for roadways, bridges, and other infrastructure that may have specific weight limits. It helps prevent accidents due to undue strain on structures and contributes to the overall safety of emergency operations.

The other options may pertain to useful information, but they do not fulfill this specific requirement outlined in NFPA® 1901.