High Quality Content by WIKIPEDIA articles! Because of safety concerns, some pesticides are not available to the general public in the United States. The "Restricted Use" classification restricts a product, or its uses, to use by a certificated pesticide applicator or under the direct supervision of a certified applicator. This means that a license is required to purchase and apply the product. Certification programs are administered by the federal government, individual states, and by company policies that vary from state to state. This is managed by the United States Environmental Protection Agency (EPA) under the Worker Protection Standard.