What information must a pesticide dealer obtain from an applicator purchasing a restricted use pesticide?

A pesticide dealer is required to obtain a current, valid license or certification number from an applicator purchasing a restricted use pesticide because this serves as verification that the applicator is authorized and trained to handle and apply such substances safely. Restricted use pesticides are classified as having a higher potential for misuse or adverse effects on human health and the environment, which is why only trained, certified individuals are permitted to purchase them. This regulation ensures that the applicator has met the necessary education and experience requirements mandated by state and federal laws, and it helps in tracking the distribution and use of these potentially hazardous pesticides to ensure responsible application practices.

The other options, while they may contain useful information or be related to the applicator's qualifications, do not fulfill the legal requirement established for purchasing restricted use pesticides. For example, a summary of the applicator's experience is not a substitute for the formal proof of certification that demonstrates compliance with safety regulations. Similarly, while a pesticide label provides important details on use and safety precautions, it is not required from the applicator as part of the purchasing process. A written application plan might be used in the context of planning pesticide application but is not a necessary document for making a purchase.