CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER E—PESTICIDE PROGRAMS (Parts 150–181) > PART 174—PROCEDURES AND REQUIREMENTS FOR PLANT-INCORPORATED PROTECTANTS > SUBPART W—Tolerances and Tolerance Exemptions (§174.500 to §174.530) > 174.526—Hygromycin B phosphotransferase (APH4) marker protein in all plants; exemption from the requirement of a tolerance.

174.526—Hygromycin B phosphotransferase (APH4) marker protein in all plants; exemption from the requirement of a tolerance.

Residues of the Hygromycin B phosphotransferase (APH4) enzyme in all plants are exempt from the requirement of a tolerance when used as a plant-incorporated protectant inert ingredient in cotton.

Code of Federal Regulations

[72 FR 20435, Apr. 25, 2007]