[Code of Federal Regulations] [Title 23, Volume 1] [Revised as of April 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 23CFR669.13] [Page 333] TITLE 23--HIGHWAYS CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 669--ENFORCEMENT OF HEAVY VEHICLE USE TAX--Table of Contents Sec. 669.13 Effect of failure to certify or to adequately obtain proof of payment. Beginning July 1, 1986, if a state fails to certify as required by this regulation or if the Secretary of Transportation determines that a state is not adequately obtaining proof of payment of the heavy vehicle use tax as a condition of registration notwithstanding the state's certification, Federal-aid highway funds apportioned to the state under 23 U.S.C. 104(b)(5) for the next fiscal year shall be reduced in an amount up to 25 percent as determined by the Secretary.