Under revised 40 CFR Part 171 standards, what is a mandatory federal requirement for a non-certified applicator applying a Restricted Use Pesticide (RUP) under the direct supervision of a certified commercial applicator?

Under 40 CFR § 171.201, noncertified applicators applying RUPs under direct supervision must receive annual qualifications/training, and the certified applicator must provide direct supervisory oversight, maintain continuous two-way voice or radio communication, and provide site-specific instructions and label access.