Final answer:
Only certified commercial pesticide applicators are legally allowed to purchase and use restricted-use pesticides, as they are trained and knowledgeable about safe use and associated risks.
Step-by-step explanation:
Under federal law, the use of restricted-use pesticides is limited to certain individuals due to their potential dangers. Specifically, a certified commercial pesticide applicator (or a licensed certified applicator) is allowed to purchase and use these chemicals. Certification involves specialized training and passing an exam that covers proper use, handling, and application of pesticides, as well as understanding the environmental and health risks associated with them. The purpose of this certification is to ensure that those who apply restricted-use pesticides are knowledgeable and can do so safely, minimizing harm to themselves, others, and the environment. In contrast, simply having several years of experience as a pesticide applicator or being a government employee does not automatically allow one to purchase restricted-use pesticides without the proper certification.