Legal Standard
40 CFR § 170.407 & Worker Protection Standard
Restricted Entry Interval (REI)
Statutory Definition:
The period of time immediately following a pesticide application during which agricultural workers are legally prohibited from entering the treated area without specialized early-entry personal protective equipment (PPE).
Practical Exam Application:
REI intervals typically range from 4 hours to 72 hours (or longer) depending on the acute dermal toxicity and irritation potential of the chemical formulation.
Official Practice Exam Questions Testing This Concept (2)
A specimen label states: 'Restricted Entry Interval (REI) is 24 hours.' Under the EPA Worker Protection Standard (40 CFR Part 170), what is prohibited during this 24-hour window?
View Legal Rationale →
Which type of pesticide application is governed by the 'Agricultural Use Requirements' box on a pesticide label?
View Legal Rationale →