7 C.F.R. § 319.37-6
(b) Small lots of seed. Lots of seed may be imported without a phytosanitary certificate required by paragraph (a) of this section under the following conditions:
(3) The seed meets the following packaging and shipping requirements:
(c) Importation of other plants for planting without phytosanitary certificates.
(4) Types of plants for planting may be added to or removed from the list of plants for planting that are not required to be accompanied by a phytosanitary certificate in accordance with § 319.37-20. The requirements for importing types of plants for planting without a phytosanitary certificate may also be changed by a notice issued in accordance with § 319.37-20. The notice published for comment will describe the documentation agreed upon by the Administrator and the NPPO of the exporting country and any additional restrictions to be imposed on the importation of the type of plants for planting.
(Approved by the Office of Management and Budget under control numbers 0579-0142, 0579-0190, 0579-0285, and 0579-0319)