(a) Plant type-specific restrictions. In addition to the general restrictions in this subpart, the Administrator may impose additional restrictions on the importation of specific types of plants for planting necessary to effectively mitigate the risk of introducing quarantine pests into the United States through the importation of specific plants for planting. Additional restrictions may be placed on the importation of the entire plant or on certain plant parts. A list of the types of plants for planting whose importation is subject to additional restrictions, and the specific restrictions that apply to the importation of each type of plants for planting, may be found in the Plants for Planting Manual.

(b) Basis for changing restrictions. The Administrator may determine that it is necessary to add, change, or remove restrictions on the importation of a specific type of plants for planting, based on the risk of introducing a quarantine pest through the importation of that type of plants for planting. The Administrator will make this determination based on the findings of a pest risk analysis or on other scientific evidence.

(c) Process for adding, changing, or removing restrictions. Restrictions on the importation of a specific type of plants for planting beyond the general restrictions in §§ 319.37-5 through 319.37-11 will be changed through the following process:

(1) Document describing restrictions. APHIS will publish in the Federal Register a notice that announces our proposed determination that it is necessary to add, change, or remove restrictions on the importation of a specific type of plants for planting. This notice will make available for public comment a document describing the restrictions that the Administrator has determined are necessary and how these restrictions will mitigate the risk of introducing quarantine pests into the United States.

(2) Response to comments. APHIS will issue a second notice after the close of the public comment period on the notice described in paragraph (c)(1) of this section. This notice will inform the public of the specific restrictions, if any, that the Administrator has determined to be necessary in order to mitigate the risk of introducing quarantine pests into the United States through the importation of the type of plants for planting. In response to the public comments submitted, the Administrator may implement the restrictions described in the document made available by the initial notice, amend the restrictions in response to public comment, or determine that changes to the restrictions on the importation of the type of plants for planting are unnecessary.

(d) Previously imposed restrictions on specific types of plants for planting. Types of plants for planting whose importation was subject to specific restrictions by specific regulation as of April 18, 2018, will continue to be subject to those restrictions, except as changed in accordance with the process specified in paragraph (c) of this section. The restrictions are found in the Plants for Planting Manual.