What minimum marking is required on utility category aircraft fuel filler covers?

Utility category aircraft fuel filler covers must have a marking that includes both the word "Avgas" and the minimum fuel grade, along with the tank capacity. This is crucial because it ensures that ground crews and pilots can quickly and accurately identify the correct type of fuel needed for the aircraft. Marking the tank capacity alongside the fuel grade enhances safety by providing vital information that prevents misfueling, which can lead to serious operational issues. By having all this information clearly indicated, it promotes adherence to regulatory requirements and improves overall aircraft operations safety.