• Subpart A [§ 301.1 - § 301.1-3] - Subpart A—Preemption and Special Need Requests

• Subpart B [§ 301.10 - § 301.11] - Subpart B—Imported Plants and Plant Parts

• Subpart C [§ 301.32 - § 301.32-10] - Subpart C—Fruit Flies

• Subpart D [§ 301.38 - § 301.38-8] - Subpart D—Black Stem Rust

• Subpart E [§ 301.45 - § 301.45-12] - Subpart E—Gypsy Moth

• Subpart F [§ 301.48 - § 301.48-8] - Subpart F—Japanese Beetle

• Subpart G - Subpart G—Pine Shoot Beetle [Reserved]

• Subpart H [§ 301.51-1 - § 301.51-9] - Subpart H—Asian Longhorned Beetle

• Subpart I [§ 301.52 - § 301.52-10] - Subpart I—Pink Bollworm

• Subpart J - Subpart J—Emerald Ash Borer [Reserved]

• Subpart K [§ 301.55 - § 301.55-9] - Subpart K—South American Cactus Moth

• Subpart L [§ 301.74 - § 301.74-5] - Subpart L—Plum Pox

• Subpart M [§ 301.75-1 - § 301.75-17] - Subpart M—Citrus Canker

• Subpart N [§ 301.76 - § 301.76-11] - Subpart N—Citrus Greening and Asian Citrus Psyllid

• Subpart O [§ 301.80 - § 301.80-10] - Subpart O—Witchweed

• Subpart P [§ 301.81 - § 301.81-11] - Subpart P—Imported Fire Ant

• Subpart Q - Subpart Q—Unshu Oranges [Reserved]

• Subpart R [§ 301.85 - § 301.85-10] - Subpart R—Golden Nematode

• Subpart S [§ 301.86 - § 301.86-9] - Subpart S—Pale Cyst Nematode

• Subpart T [§ 301.87 - § 301.87-10] - Subpart T—Sugarcane Diseases

• Subpart U [§ 301.89-1 - § 301.89-16] - Subpart U—Karnal Bunt

• Subpart V - Subpart V—Corn Cyst Nematode [Reserved]

• Subpart W [§ 301.91 - § 301.91-9] - Subpart W—European Larch Canker

• Subpart X [§ 301.92 - § 301.92-12] - Subpart X—Phytophthora Ramorum