§ 174.537 HPPD-4 protein; exemption from the requirement of a tolerance.
Residues of the HPPD-4 protein, which is a modified protein derived from the 4-hydroxyphenylpyruvate dioxygenase enzyme of Pseudomonas fluorescens, in or on all food commodities are exempt from the requirement of a tolerance, when the HPPD-4 protein is used as a plant-incorporated protectant inert ingredient.
[82 FR 57140, Dec. 4, 2017]