Section 357.4 - Exceptions from the declaration requirementPlants and products containing plant materials are excepted from the declaration requirement if:
(a) The plant is used exclusively as packaging material to support, protect, or carry another item, unless the packaging material itself is the item being imported; or(b) The plant material in a product represents no more than 5 percent of the total weight of the individual product unit, provided that the total weight of the plant material in an entry of products in the same 10-digit provision of the Harmonized Tariff Schedule of the United States does not exceed 2.9 kilograms.(c) A product will not be eligible for an exception under paragraph (b) of this section if it contains plant material listed:(1) In an appendix to the Convention on International Trade in Endangered Species of Wild Fauna and Flora (27 UST 1087; TIAS 8249);(2) As an endangered or threatened species under the Endangered Species Act of 1973 (16 U.S.C. 1531 et seq.); or(3) Pursuant to any State law that provides for the conservation of species that are indigenous to the State and are threatened with extinction. 85 FR 12212 , Mar. 2, 2020