81.35—Reduction of claims.
         The Secretary or an authorized Departmental official as appropriate may, after the issuance of a disallowance decision, reduce the amount of a claim established under this subpart by—
    
    
        
        (a) 
         Redetermining the claim on the basis of the proper application of the law, including the standards for the measure of recovery under  § 81.31, to the facts;