40 CFR § 157.27
Unit packaging
June 9, 2020
Pesticide products distributed or sold as an aggregate of one or more unit packages and meeting the criteria of §157.22 must be distributed or sold in child-resistant packaging either for each unit package or for the outer retail container which contains the unit packages. Child-resistant packaging is not required for both the outer package and the unit packages unless the Agency determines, on a case-by-case basis, that it is necessary for risk reduction.