[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: 40CFR57.505] [Page 149] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 57_PRIMARY NONFERROUS SMELTER ORDERS--Table of Contents Subpart E_Fugitive Emission Evaluation and Control Sec. 57.505 Amendments of the NSO. An NSO shall be amended within three months of submission of any report required under Sec. 57.504 so as to require additional fugitive emission control measures if such report establishes that such additional measures are necessary to assure that the NAAQS will be maintained with a reasonable degree of reliability. [[Page 150]]