[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: 39CFR501.17] [Page 181] TITLE 39--POSTAL SERVICE CHAPTER I--UNITED STATES POSTAL SERVICE PART 501--AUTHORIZATION TO MANUFACTURE AND DISTRIBUTE POSTAGE METERS--Table of Contents Sec. 501.17 Protection of printing dies and keys. During the process of fabricating parts and assembling postage meters, the manufacturer must exercise due care to prevent loss or theft of keys or of serially numbered postage-printing dies or component parts (such as denomination-printing dies, or auxiliary power supply and meter-setting equipment for electronic meters) that might be used in some manner to defraud the Postal Service of revenue. All serially numbered printing dies produced should be accounted for by assembly into meters or by evidence of mutilation or destruction. Postage printing dies removed from meters and not suitable for reassembly must also be mutilated so that the dies cannot be used or they must be completely destroyed.