When must pilots wear label-required personal protective equipment for pesticide handlers?

Pilots must wear label-required personal protective equipment for pesticide handlers while making nozzle adjustments because this activity involves a direct interaction with the pesticide application system. During this specific task, there is a heightened risk of pesticide exposure due to the potential for spills, drips, or other forms of contact with the chemical.

Proper personal protective equipment is designed to minimize this risk and ensure the safety of the individual handling pesticides. While there may be other times when safety precautions are important, such as during takeoff or landing, the most critical period for wearing this equipment is when the pilot is directly handling anything that could expose them to pesticides. This understanding reinforces the importance of safety protocols tailored to specific activities within the pesticide application process.