[Code of Federal Regulations] [Title 33, Volume 1] [Revised as of July 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR67.10-40] [Page 169] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PART 67_AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES --Table of Contents Subpart 67.10_General Requirements for Sound signals Sec. 67.10-40 Sound signals authorized for use prior to January 1, 1973. Any sound signal authorized for use by the Coast Guard and manufactured prior to January 1, 1973, is excepted from the requirements in this subpart, except Sec. Sec. 67.10-1 (b) and (c), 67.10-5, and 67.10-10, if the sound signal has a minimum sound pressure level as specified in Table A of Subpart 67.10 of Title 33 of the Code of Federal Regulations in effect on December 31, 1972, for the range required by Sec. 67.20-10, Sec. 67.25-10, or Sec. 67.30-10.