From Northwest Mexico
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
Contingent upon continued freedom of Northwest Mexico and of the West Coast of Mexico from infestations of the pink bollworm and other plant pest conditions that would increase risk of pest introduction into the United States with importations authorized under this section, entry of the following products may be authorized under permit subject to inspection upon arrival to determine freedom from hazardous plant pest conditions:
(a) Lint, linters, and waste.
(b) Cottonseed.
(c) Cottonseed hulls.
(d) Covers that have been used for cotton only.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.