Which of the following actions regarding pesticide distribution is unlawful?

Receiving unregistered pesticides is unlawful because such products have not undergone the required registration process with regulatory authorities. This registration is essential to ensure that pesticides have been evaluated for their safety and effectiveness. Unregistered pesticides may not have been tested thoroughly and could pose risks to human health or the environment, making it illegal for a dealer to possess or distribute them.

In contrast, transferring registered pesticides, selling to certified applicators, and shipping within the state are permissible activities as long as they comply with existing regulations concerning registered products. Registered pesticides have met the necessary criteria set forth by state and federal laws, which are designed to protect public health and ensure that pesticides are used safely and effectively.