145.73—Collection of amounts due.
        
        (a) 
         Any funds paid to a recipient in excess of the amount to which the recipient is finally determined to be entitled under the terms and conditions of the award constitute a debt to the Federal Government. If not paid within a reasonable period after the demand for payment, the Department may reduce the debt by:
    
    
    
    
    
        
        (b) 
         Except as otherwise provided by law, the Department shall charge interest on an overdue debt in accordance with 4 CFR Chapter II, Federal Claims Collection Standards.