What does REI stand for and what does it require?

• A. Required Entry Instructions; entry to treated area is posted.
• B. Restricted Entry Interval; entry to treated area is not allowed for the time specified on the label, unless exceptions are stated on the label.
• C. Regulated Entry Intervention; workers must be trained.
• D. Restricted Employee Instruction; workers must be supervised.

Answer: (B)

REI stands for Restricted Entry Interval. It defines how long workers must stay out of a treated area after a pesticide is applied. The requirement is that entry is not allowed for the time shown on the label, unless the label itself specifies exceptions that allow entry under certain conditions. This protects workers from exposure during the period when residues may be present. Other phrases listed aren’t the standard term or don’t describe the requirement: they either misname the concept or describe other posting or instruction ideas that aren’t the REI.