[Code of Federal Regulations] [Title 40, Volume 20] [Revised as of July 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR163.1] [Page 162] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 163--CERTIFICATION OF USEFULNESS OF PESTICIDE CHEMICALS--Table of Contents Sec. 163.1 Words in the singular form. Words in this part in the singular form shall be deemed to import the plural, and vice versa, as the case may demand.