Under which set of circumstances would the certified applicator be required to be physically present at the application site?

The requirement for a certified applicator to be physically present at the application site is dictated by state law or the specific pesticide label instructions. This stipulation ensures that applications are conducted safely and in accordance with regulatory standards. Pesticide labels often contain detailed instructions and restrictions that must be followed to minimize risks to people, wildlife, and the environment. State laws can also impose additional requirements regarding the presence of the applicator, especially in cases where complex or hazardous application practices are involved.

While other circumstances, such as applying in sensitive areas or using high-toxicity pesticides, may necessitate careful attention and compliance with safety protocols, the overriding factor that mandates the physical presence of the certified applicator is specific legal or label requirements. Thus, adhering to these rules helps ensure that applications are carried out responsibly and effectively.