89.23—Interest, late payment penalties, and collection charges.

(a) DOT shall charge interest on an outstanding debt at the Treasury Current Value of Funds Rate published by the Secretary of the Treasury in accordance with 31 U.S.C. 3717 and 4 CFR 102.13(c), unless DOT determines that a higher rate is necessary to protect the interests of the United States. DOT shall charge a late payment penalty at a rate of six percent a year on any portion of a debt that is more than 90 days past due. DOT shall also assess administrative charges to cover additional cost incurred in processing and handling the debt beyond the payment due date. The imposition of interest, collection charges, and late payment penalty charges shall be made in accordance with 31 U.S.C. 3717, 4 CFR 102.13 (see § 89.3(c) regarding payment of such charges by Federal, state and local government agencies).