EPA is updating the existing regulation concerning the certification of applicators of restricted use pesticides (RUPs) in response to public comments received on the proposal and based on extensive stakeholder review of the existing regulation and its implementation since 1974. The final revised regulation will ensure Federal certification program standards adequately protect applicators, the public, and the environment from risks associated with use of RUPs. The final rule will improve the competency of certified applicators of RUPs, increase protection for noncertified applicators using RUPs under the direct supervision of a certified applicator through enhanced pesticide safety training and standards for supervision of noncertified applicators, and establish a minimum age requirement for certified and noncertified applicators using RUPs under the direct supervision of a certified applicator. Recognizing EPA's commitment to work more closely with Tribal governments to strengthen environmental protection in Indian country, the final rule will provide more practical options for establishing certification programs in Indian country.