[Code of Federal Regulations] [Title 40, Volume 5] [Revised as of July 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR57.106] [Page 134] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 57_PRIMARY NONFERROUS SMELTER ORDERS--Table of Contents Subpart A_General Sec. 57.106 Expiration date. Each NSO shall state its expiration date. No NSO issued under this regulation shall expire later than January 1, 1988. [[Page 135]]