[Code of Federal Regulations] [Title 39, Volume 1] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 39CFR501.15] [Page 180] TITLE 39--POSTAL SERVICE CHAPTER I--UNITED STATES POSTAL SERVICE PART 501--AUTHORIZATION TO MANUFACTURE AND DISTRIBUTE POSTAGE METERS--Table of Contents Sec. 501.15 Materials and workmanship. All meters must adhere to the quality in materials and workmanship of the approved production model and must be manufactured with suitable jigs, dies, tools, etc., to ensure proper maintenance and interchangeability of parts.