[Code of Federal Regulations] [Title 23, Volume 1] [Revised as of April 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 23CFR669.7] [Page 331] TITLE 23--HIGHWAYS CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 669--ENFORCEMENT OF HEAVY VEHICLE USE TAX--Table of Contents Sec. 669.7 Certification requirement. The Governor of each state, or his or her designee, shall certify to the FHWA before July 1 of each year that it is obtaining proof of payment of the heavy vehicle use tax as a condition of registration in accordance with 23 U.S.C. 141(d). The certification shall cover the 12- month period (8 months for the initial certification period) ending May 31.