[Code of Federal Regulations] [Title 19, Volume 1] [Revised as of April 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 19CFR112.43] [Page 480] TITLE 19--CUSTOMS DUTIES CHAPTER I--UNITED STATES CUSTOMS SERVICE, DEPARTMENT OF THE TREASURY PART 112--CARRIERS, CARTMEN, AND LIGHTERMEN--Table of Contents Subpart D--Identification Cards Sec. 112.43 Form of identification card. The identification card shall be issued on Customs Form 3873 and shall not be valid unless signed by the employee and a Customs officer and the U.S. Customs seal is impressed thereon. The holder shall encase the card in protective transparent plastic so that both sides are clearly visible.