Which is true about warning signs posted around treated farming areas?

The statement that warning signs must be legible during the entire Restricted Entry Interval (REI) is true because it ensures the safety of individuals who may enter the treated area after pesticide application. The REI is a critical period following pesticide application during which entry to the area is restricted to protect workers from potential exposure to harmful chemicals. For this reason, maintaining legibility of the warning signs throughout the REI is essential; it serves as a continuous reminder of the potential hazards present in the area, helping to prevent accidental exposure.

In addition, if warning signs are not clearly visible or unreadable, it defeats their purpose and could lead to unintentional entry into hazardous areas. This requirement is in place to enhance safety protocols and ensure compliance with agricultural pesticide regulations.