1. (a) Except for those kinds of noxious-weed seeds shown in paragraph (b) of this section, the names of the kinds of noxious-weed seeds and the rate of occurrence of each shall be expressed in the label in accordance with, and the rate of occurrence shall not exceed the rate permitted by, the law and regulations of the State into which the seed is offered for transportation or is transported. If in the course of such transportation, or thereafter, the seed is diverted to another State of destination, the person or persons responsible for such diversion shall cause the seed to be relabeled with respect to the noxious-weed seed content, if necessary to conform to the laws and regulations of the State into which the seed is diverted.

2. (b) Seeds or bulblets of the following plants shall be considered noxious-weed seeds in agricultural and vegetable seeds transported or delivered for transportation in interstate commerce (including Puerto Rico, Guam, and the District of Columbia). Agricultural or vegetable seed containing seeds or bulblets of these kinds shall not be transported or delivered for transportation in interstate commerce. Noxious-weed seeds include the following species on which no tolerance will be applied:

   Aeginetia spp. Ageratina adenophora (Spreng.) King and H.E. Robins. Alectra spp. Alternanthera sessilis (L.) DC. Asphodelus fistulosus L. Avena sterilis L. (including Avena ludoviciana Dur.) Azolla pinnata R. Br. Carthamus oxyacantha M. Bieb Cenchrus caudatus (Schrad.) Kuntze Cenchrus clandestinus Morrone Cenchrus pedicellatus (Trin.) Morrone Cenchrus polystachios (L.) Morrone Chrysopogon aciculatus (Retz.) Trin. Commelina benghalensis L. Crupina vulgaris Cass. Digitaria abyssinica Stapf. (=D. scalarum (Schweinf.) Chiov.) Digitaria scalarum (Schweinfurth) Chiovenda Dinebra chinensis (L.) P. M. Peterson & N. Snow Drymaria arenarioides Roem. and Schult. Eichornia azurea (Sw.) Kunth Galega officinalis L. Heracleum mantegazzianum Sommier & Levier Homeria spp. Hydrilla verticillata (L. f.) Royle Hygrophila polysperma T. Anders. Imperata brasiliensis Trin. Imperata cylindrica (L.) Raeusch. Ipomoea aquatica Forsk. Ischaemum rugosum Salisb. Lagarosiphon major (Ridley) Moss Limnophila sessiliflora (Vahl) Blume Lycium ferocissimum Miers Melaleuca quinquenervia (Cav.) Blake Melastoma malabathricum L. Mikania cordata (Burm. f.) B.L. Robins. Mikania micrantha H.B.K. Mimosa invisa Mart. Mimosa pigra L. var. pigra Monochoria hastata (L.) Sloms-Laub. Monochoria vaginalis (Burm. f.) K.B. Presl Nassella trichotoma (Nees) Arechavaleta Opuntia aurantiaca Lindl. Oryza longistaminata A. Cheval. and Roehr. Oryza punctata Steud. Oryza rufipogon Griff. Ottelia alismoides (L.) Pers. Paspalum scrobiculatum L. Prosopis alapataco R.A. Philippi Prosopis argentina Burkart Prosopis articulata S. Watson Prosopis burkartii Munoz Prosopis caldenia Burkart Prosopis calingastana Burkart Prosopis campestris Griseb. Prosopis castellanosii Burkart Prosopis denudans Benth. Prosopis elata (Burkart) Burkart Prosopis farcta (Russell) Macbride Prosopis ferox Griseb. Prosopis fiebrigii Harms Prosopis hassleri Harms Prosopis humilis Hook. and Arn. Prosopis kuntzei Harms Prosopis pallida (Willd.) H.B.K. Prosopis palmeri S. Watson Prosopis reptans Benth. var. reptans Prosopis rojasiana Burkart Prosopis ruizlealii Burkart Prosopis ruscifolia Griseb. Prosopis sericantha Hook. and Arn. Prosopis strombulifera (Lam.) Benth. Prosopis torquata (Lagasca) DC. Rottboellia cochinchinensis (Lour.) Clayton Rubus moluccanus L. Rubus plicatus Weihe & Nees Rumex hypogaeus T.M. Schust & Reveal Rumex spinosus L. Saccharum spontaneum L. Sagittaria sagittifolia L. Salsola vermiculata L. Salvinia auriculata Aubl. Salvinia biloba Raddi Salvinia herzogii de la Sota Salvinia molesta D.S. Mitchell Senecio inaequidens DC. Setaria pallide-fusca (Schumach.) Stapf and Hubb. Solanum tampicense Dunal Solanum torvum Sw. Solanum viarum Dunal Sparaganium erectum L. Spermacoce alata (Aublet) de Candolle Striga spp. Tridax procumbens L. Urochloa panicoides Beauv.

[65 FR 1706, Jan. 11, 2000, as amended at 76 FR 31794, June 2, 2011]