When a supervising Certified Technician is not on-site, what must they ensure about the uncertified technician?

The correct choice emphasizes the comprehensive responsibilities of a supervising Certified Technician (CT) when they are not physically present at a job site. When a CT is supervising an uncertified technician, it is vital that the CT ensures specific protocols are in place to maintain safety and compliance with regulations governing pesticide application.

First, having the labels of all pesticides applied is crucial for safety, regulatory compliance, and proper application procedures. Labels contain important information about the product, including safety precautions and first aid measures, which the uncertified technician must be aware of before handling or applying pesticides.

Next, ensuring that the uncertified technician can contact the CT is fundamental for immediate support and guidance. The availability of the CT allows the uncertified technician to ask questions, report issues, or seek direction during the job, ensuring that procedures are followed correctly.

Finally, the requirement that the CT can be at the job site within one hour is important for quick oversight and intervention if any problems arise. This time frame reflects a commitment to safety and accountability, as it ensures that the uncertified technician has access to a qualified professional without significant delays.

Therefore, all these conditions together—access to pesticide labels, the ability to contact the CT, and the CT's readiness to be present if necessary—