[Code of Federal Regulations] [Title 49, Volume 4] [Revised as of October 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR222.42] [Page 275] TITLE 49--TRANSPORTATION CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 222_USE OF LOCOMOTIVE HORNS AT PUBLIC HIGHWAY-RAIL GRADE CROSSINGS --Table of Contents Subpart C_Exceptions to the Use of the Locomotive Horn Sec. 222.42 How does this rule affect Intermediate Quiet Zones and Intermediate Partial Quiet Zones? (a) Existing restrictions may, at the public authority's discretion, remain in place within the Intermediate Quiet Zone or Intermediate Partial Quiet Zone until June 24, 2006, provided the public authority complies with Sec. 222.43 (notice and information requirements) of this part. Continuation of the quiet zone beyond June 24, 2006 will require implementation of SSMs or ASMs in accordance with Sec. 222.39 of this part and compliance with the New Quiet Zone standards set forth in Sec. Sec. 222.25, 222.27 and 222.35 of this part. (b) Conversion of Intermediate Partial Quiet Zones into 24-hour New Quiet Zones. An Intermediate Partial Quiet Zone may be converted into a 24-hour New Quiet Zone when the quiet zone is brought into compliance with the New Quiet Zone requirements set forth in Sec. Sec. 222.25, 222.27, 222.35 and 222.39 (requirements for quiet zone establishment) of this part, provided notification of New Quiet Zone establishment is provided in accordance with Sec. 222.43 (notice and information requirements) of this part.