19 CFR 12.1 : Customs Duties (§ 0.1 To Parts 400-599) — (§ 0.1 To Parts 135-140) — U.S. Customs And Border Protection, Department Of Homeland Security; Department Of The Treasury (§ 0.1 To Parts 135-140) — Special Classes Of Merchandise (§ 12.1 To § 12.152) — Food, Drugs, And Cosmetics, Economic Poisons, Hazardous Substances, And Dangerous Caustic Or Corrosive Substances (§ 12.1 To § 12.5) — Cooperation with certain agencies; joint regulations.