(a) Under the authority of section 412 of the Plant Protection Act, the Secretary of Agriculture may prohibit or restrict the movement in interstate commerce of any plant or plant product if the Secretary determines that the prohibition or restriction is necessary to prevent the introduction into the United States or the dissemination within the United States of a plant pest or noxious weed.

(b) The Secretary has determined that it is necessary to prohibit the interstate movement of cut flowers and fruits and vegetables and plants and portions of plants from Hawaii, Puerto Rico, the U.S. Virgin Islands, Guam, and the Commonwealth of the Northern Mariana Islands except as provided in this subpart or as provided in “Subpart B—Territorial Cotton, Cottonseed, and Cottonseed Products” and “Subpart C—Sand, Soil, or Earth, with Plants from Territories and Districts” in this part.