669.13—Effect of failure to certify or to adequately obtain proof-of-payment.
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)(4) for the next fiscal year shall be reduced in an amount up to 25 percent as determined by the Secretary.