According to the law, what must be present at all times when using pesticides?

The requirement for having a label present at all times when using pesticides is fundamental to ensuring safe and effective application. The label provides vital information about the pesticide, including its intended use, application methods, active ingredients, safety precautions, and first aid instructions. This information is critical for the applicator to follow the legal and safety guidelines specified by the Environmental Protection Agency (EPA) and state regulations.

In addition, having the label on hand helps the applicator understand any specific restrictions or requirements pertaining to the pesticide's use, such as environmental protection measures or limitations on usage. It serves as a reference document that informs the applicator of best practices and ensures compliance with legal standards to protect human health and the environment. Thus, possessing the label during pesticide application is a legal requirement and a key component of responsible pest management.