(a) Prohibition of unauthorized movement of plant pests
Except as provided in subsection (c), no person shall import, enter, export, or move in interstate commerce any plant pest, unless the importation, entry, exportation, or movement is authorized under general or specific permit and is in accordance with such regulations as the Secretary may issue to prevent the introduction of plant pests into the United States or the dissemination of plant pests within the United States.

(b) Requirements for processes
The Secretary shall ensure that the processes used in developing regulations under subsection (a) governing consideration of import requests are based on sound science and are transparent and accessible.

(c) Authorization of movement of plant pests by regulation

(1) Exception to permit requirement
The Secretary may issue regulations to allow the importation, entry, exportation, or movement in interstate commerce of specified plant pests without further restriction if the Secretary finds that a permit under subsection (a) is not necessary.

(2) Petition to add or remove plant pests from regulation
Any person may petition the Secretary to add a plant pest to, or remove a plant pest from, the regulations issued by the Secretary under paragraph (1).

(3) Response to petition by the Secretary
In the case of a petition submitted under paragraph (2), the Secretary shall act on the petition within a reasonable time and notify the petitioner of the final action the Secretary takes on the petition. The Secretary's determination on the petition shall be based on sound science.

(d) Prohibition of unauthorized mailing of plant pests

(1) In general
Any letter, parcel, box, or other package containing any plant pest, whether sealed as letter-rate postal matter or not, is nonmailable and shall not knowingly be conveyed in the mail or delivered from any post office or by any mail carrier, unless the letter, parcel, box, or other package is mailed in compliance with such regulations as the Secretary may issue to prevent the dissemination of plant pests into the United States or interstate.

(2) Application of postal laws and regulations
Nothing in this subsection authorizes any person to open any mailed letter or other mailed sealed matter except in accordance with the postal laws and regulations.

(e) Regulations
Regulations issued by the Secretary to implement subsections (a), (c), and (d) may include provisions requiring that any plant pest imported, entered, to be exported, moved in interstate commerce, mailed, or delivered from any post office—

(1) be accompanied by a permit issued by the Secretary prior to the importation, entry, exportation, movement in interstate commerce, mailing, or delivery of the plant pest;

(2) be accompanied by a certificate of inspection issued (in a manner and form required by the Secretary) by appropriate officials of the country or State from which the plant pest is to be moved;

(3) be raised under post-entry quarantine conditions by or under the supervision of the Secretary for the purposes of determining whether the plant pest—

(A) may be infested with other plant pests;

(B) may pose a significant risk of causing injury to, damage to, or disease in any plant or plant product; or

(C) may be a noxious weed; and

(4) be subject to remedial measures the Secretary determines to be necessary to prevent the spread of plant pests.