[Code of Federal Regulations] [Title 40, Volume 23] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR180.1249] [Page 626] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 180_TOLERANCES AND EXEMPTIONS FROM TOLERANCES FOR PESTICIDE CHEMICALS IN Subpart D_Exemptions From Tolerances Sec. 180.1249 Hygromycin B phospho transferase (APH4) marker protein and the genetic material necessary for its production in all plants; exemption from the requirement of a tolerance. Hygromycin B phosphotransferase (APH4) and the genetic material necessary for its production in all plants are exempt from the requirement of a tolerance when used as a plant-incorporated protectant inert ingredient in cotton. ``Genetic material necessary for its production'' means the genetic material which comprise genetic material encoding the APH4 protein and its regulatory regions. ``Regulatory regions'' are the genetic material that control the expression of the genetic material encoding the APH4 protein, such as promoters, terminators, and enhancers. [69 FR 18278, Apr. 7, 2004] Effective Date Note: At 72 FR 20434, 20435, Apr. 25, 2007, Sec. 180.1249 was redesignated as Sec. 174.526 and revised, effective July 24, 2007. For the convenience of the user, the revised text is set forth as follows: